3121497 has 20 divisors (see below), whose sum is σ = 4726260. Its totient is φ = 2052864.

The previous prime is 3121493. The next prime is 3121519. The reversal of 3121497 is 7941213.

It can be written as a sum of positive squares in 2 ways, for example, as 467856 + 2653641 = 684^2 + 1629^2 .

It is not a de Polignac number, because 3121497 - 2² = 3121493 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

3121497 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3121497.

It is not an unprimeable number, because it can be changed into a prime (3121493) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6993 + ... + 7425.

It is an arithmetic number, because the mean of its divisors is an integer number (236313).

Almost surely, 2^3121497 is an apocalyptic number.

It is an amenable number.

3121497 is a deficient number, since it is larger than the sum of its proper divisors (1604763).

3121497 is an equidigital number, since it uses as much as digits as its factorization.

3121497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534 (or 525 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 3121497 is about 1766.7758771276. The cubic root of 3121497 is about 146.1462380371.

It can be divided in two parts, 31 and 21497, that added together give a triangular number (21528 = T₂₀₇).

The spelling of 3121497 in words is "three million, one hundred twenty-one thousand, four hundred ninety-seven".