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 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).

2^1025406 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.

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

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