615897 has 8 divisors (see below), whose sum is σ = 912480. Its totient is φ = 410580.

The previous prime is 615887. The next prime is 615907. The reversal of 615897 is 798516.

It is an interprime number because it is at equal distance from previous prime (615887) and next prime (615907).

It is not a de Polignac number, because 615897 - 2⁶ = 615833 is a prime.

It is a super-2 number, since 2×615897² = 758658229218, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 615897.

It is not an unprimeable number, because it can be changed into a prime (615827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11379 + ... + 11432.

It is an arithmetic number, because the mean of its divisors is an integer number (114060).

2⁶¹⁵⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

615897 is a deficient number, since it is larger than the sum of its proper divisors (296583).

615897 is a wasteful number, since it uses less digits than its factorization.

615897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22820 (or 22814 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 615897 is about 784.7910549949. The cubic root of 615897 is about 85.0816746673.

The spelling of 615897 in words is "six hundred fifteen thousand, eight hundred ninety-seven".