1520739 has 12 divisors (see below), whose sum is σ = 2396472. Its totient is φ = 921600.

The previous prime is 1520723. The next prime is 1520747. The reversal of 1520739 is 9370251.

It is not a de Polignac number, because 1520739 - 2⁴ = 1520723 is a prime.

It is a super-2 number, since 2×1520739² = 4625294212242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1520719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7582 + ... + 7779.

It is an arithmetic number, because the mean of its divisors is an integer number (199706).

2^1520739 is an apocalyptic number.

1520739 is a deficient number, since it is larger than the sum of its proper divisors (875733).

1520739 is a wasteful number, since it uses less digits than its factorization.

1520739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15378 (or 15375 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 1520739 is about 1233.1824682503. The cubic root of 1520739 is about 114.9965720465.

The spelling of 1520739 in words is "one million, five hundred twenty thousand, seven hundred thirty-nine".