Search a number
-
+
1025406 = 233171117
BaseRepresentation
bin11111010010101111110
31221002121000
43322111332
5230303111
633551130
711500344
oct3722576
91832530
101025406
11640448
124154a6
1329b965
141c9994
15153c56
hexfa57e

1025406 has 32 divisors (see below), whose sum is σ = 2414880. Its totient is φ = 321408.

The previous prime is 1025393. The next prime is 1025407. The reversal of 1025406 is 6045201.

It can be divided in two parts, 1025 and 406, that added together give a triangular number (1431 = T53).

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 360 + ... + 1476.

It is an arithmetic number, because the mean of its divisors is an integer number (75465).

21025406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1025406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1207440).

1025406 is an abundant number, since it is smaller than the sum of its proper divisors (1389474).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1025406 is a wasteful number, since it uses less digits than its factorization.

1025406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145 (or 1139 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1025406 is about 1012.6233258226. The cubic root of 1025406 is about 100.8397943784.

The spelling of 1025406 in words is "one million, twenty-five thousand, four hundred six".

Divisors: 1 2 3 6 9 17 18 27 34 51 54 102 153 306 459 918 1117 2234 3351 6702 10053 18989 20106 30159 37978 56967 60318 113934 170901 341802 512703 1025406