3161540 has 12 divisors (see below), whose sum is σ = 6639276. Its totient is φ = 1264608.

The previous prime is 3161519. The next prime is 3161567. The reversal of 3161540 is 451613.

It can be written as a sum of positive squares in 2 ways, for example, as 1110916 + 2050624 = 1054^2 + 1432^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 158077 = 3161540 / (3 + 1 + 6 + 1 + 5 + 4 + 0).

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, 79019 + ... + 79058.

It is an arithmetic number, because the mean of its divisors is an integer number (553273).

Almost surely, 2^3161540 is an apocalyptic number.

It is an amenable number.

3161540 is an abundant number, since it is smaller than the sum of its proper divisors (3477736).

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

3161540 is a wasteful number, since it uses less digits than its factorization.

3161540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158086 (or 158084 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 3161540 is about 1778.0719895437. The cubic root of 3161540 is about 146.7685128240.

It can be divided in two parts, 3 and 161540, that multiplied together give a triangular number (484620 = T₉₈₄).

The spelling of 3161540 in words is "three million, one hundred sixty-one thousand, five hundred forty".