1520164874 has 4 divisors (see below), whose sum is σ = 2280247314. Its totient is φ = 760082436.

The previous prime is 1520164843. The next prime is 1520164879. The reversal of 1520164874 is 4784610251.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1187284849 + 332880025 = 34457^2 + 18245^2 .

It is not an unprimeable number, because it can be changed into a prime (1520164879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 380041217 + ... + 380041220.

Almost surely, 2^1520164874 is an apocalyptic number.

1520164874 is a deficient number, since it is larger than the sum of its proper divisors (760082440).

1520164874 is an equidigital number, since it uses as much as digits as its factorization.

1520164874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760082439.

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 1520164874 is about 38989.2917863354. The cubic root of 1520164874 is about 1149.8209863762.

The spelling of 1520164874 in words is "one billion, five hundred twenty million, one hundred sixty-four thousand, eight hundred seventy-four".