1957531 has 4 divisors (see below), whose sum is σ = 1975600. Its totient is φ = 1939464.

The previous prime is 1957523. The next prime is 1957547. The reversal of 1957531 is 1357591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1357591 = 71 ⋅19121.

It is a cyclic number.

It is not a de Polignac number, because 1957531 - 2³ = 1957523 is a prime.

It is a super-2 number, since 2×1957531² = 7663855231922, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1957493 and 1957502.

It is not an unprimeable number, because it can be changed into a prime (1957591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8871 + ... + 9088.

It is an arithmetic number, because the mean of its divisors is an integer number (493900).

2^1957531 is an apocalyptic number.

1957531 is a deficient number, since it is larger than the sum of its proper divisors (18069).

1957531 is a wasteful number, since it uses less digits than its factorization.

1957531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18068.

The product of its digits is 4725, while the sum is 31.

The square root of 1957531 is about 1399.1179364157. The cubic root of 1957531 is about 125.0939240751.

The spelling of 1957531 in words is "one million, nine hundred fifty-seven thousand, five hundred thirty-one".