1520664 has 16 divisors (see below), whose sum is σ = 3801720. Its totient is φ = 506880.

The previous prime is 1520653. The next prime is 1520681. The reversal of 1520664 is 4660251.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 63361 = 1520664 / (1 + 5 + 2 + 0 + 6 + 6 + 4).

It is a congruent number.

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, 31657 + ... + 31704.

2^1520664 is an apocalyptic number.

It is an amenable number.

1520664 is an abundant number, since it is smaller than the sum of its proper divisors (2281056).

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

1520664 is a wasteful number, since it uses less digits than its factorization.

1520664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63370 (or 63366 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1520664 is about 1233.1520587503. The cubic root of 1520664 is about 114.9946815436.

The spelling of 1520664 in words is "one million, five hundred twenty thousand, six hundred sixty-four".