1381650 has 48 divisors (see below), whose sum is σ = 3505728. Its totient is φ = 360000.

The previous prime is 1381649. The next prime is 1381693. The reversal of 1381650 is 561831.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1381650.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9075 + ... + 9225.

It is an arithmetic number, because the mean of its divisors is an integer number (73036).

2^1381650 is an apocalyptic number.

1381650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1381650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1752864).

1381650 is an abundant number, since it is smaller than the sum of its proper divisors (2124078).

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

1381650 is a wasteful number, since it uses less digits than its factorization.

1381650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1381650 is about 1175.4360892877. The cubic root of 1381650 is about 111.3779825775.

The spelling of 1381650 in words is "one million, three hundred eighty-one thousand, six hundred fifty".