1015640 has 16 divisors (see below), whose sum is σ = 2285280. Its totient is φ = 406240.

The previous prime is 1015627. The next prime is 1015661. The reversal of 1015640 is 465101.

It is a happy number.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12656 + ... + 12735.

It is an arithmetic number, because the mean of its divisors is an integer number (142830).

2^1015640 is an apocalyptic number.

1015640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1015640 is an abundant number, since it is smaller than the sum of its proper divisors (1269640).

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

1015640 is a wasteful number, since it uses less digits than its factorization.

1015640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25402 (or 25398 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1015640 is about 1007.7896605939. The cubic root of 1015640 is about 100.5186388208.

The spelling of 1015640 in words is "one million, fifteen thousand, six hundred forty".