1531972 has 24 divisors (see below), whose sum is σ = 3058776. Its totient is φ = 665088.

The previous prime is 1531909. The next prime is 1531987. The reversal of 1531972 is 2791351.

It can be written as a sum of positive squares in 4 ways, for example, as 148996 + 1382976 = 386^2 + 1176^2 .

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1531972.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18 + ... + 1750.

It is an arithmetic number, because the mean of its divisors is an integer number (127449).

2^1531972 is an apocalyptic number.

It is an amenable number.

1531972 is a deficient number, since it is larger than the sum of its proper divisors (1526804).

1531972 is a wasteful number, since it uses less digits than its factorization.

1531972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1767 (or 1765 counting only the distinct ones).

The product of its digits is 1890, while the sum is 28.

The square root of 1531972 is about 1237.7285647508. The cubic root of 1531972 is about 115.2790200196.

The spelling of 1531972 in words is "one million, five hundred thirty-one thousand, nine hundred seventy-two".