1531864 has 16 divisors (see below), whose sum is σ = 2885400. Its totient is φ = 762432.

The previous prime is 1531861. The next prime is 1531897. The reversal of 1531864 is 4681351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1531861) 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, 3124 + ... + 3580.

2^1531864 is an apocalyptic number.

It is an amenable number.

1531864 is a deficient number, since it is larger than the sum of its proper divisors (1353536).

1531864 is a wasteful number, since it uses less digits than its factorization.

1531864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882 (or 878 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 1531864 is about 1237.6849356763. The cubic root of 1531864 is about 115.2763110000.

The spelling of 1531864 in words is "one million, five hundred thirty-one thousand, eight hundred sixty-four".