1597881 has 24 divisors (see below), whose sum is σ = 2406880. Its totient is φ = 940032.

The previous prime is 1597877. The next prime is 1597913. The reversal of 1597881 is 1887951.

It is not a de Polignac number, because 1597881 - 2² = 1597877 is a prime.

It is a super-2 number, since 2×1597881² = 5106447380322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

1597881 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1597801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16425 + ... + 16521.

2^1597881 is an apocalyptic number.

It is an amenable number.

1597881 is a deficient number, since it is larger than the sum of its proper divisors (808999).

1597881 is a wasteful number, since it uses less digits than its factorization.

1597881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 136 counting only the distinct ones).

The product of its digits is 20160, while the sum is 39.

The square root of 1597881 is about 1264.0731782614. The cubic root of 1597881 is about 116.9090534379.

The spelling of 1597881 in words is "one million, five hundred ninety-seven thousand, eight hundred eighty-one".