1520139 has 8 divisors (see below), whose sum is σ = 2115072. Its totient is φ = 969320.

The previous prime is 1520131. The next prime is 1520143. The reversal of 1520139 is 9310251.

1520139 = 246² + 247² + ... + 268².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1520139 - 2³ = 1520131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1520131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10947 + ... + 11084.

It is an arithmetic number, because the mean of its divisors is an integer number (264384).

2^1520139 is an apocalyptic number.

1520139 is a deficient number, since it is larger than the sum of its proper divisors (594933).

1520139 is a wasteful number, since it uses less digits than its factorization.

1520139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22057.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 1520139 is about 1232.9391712489. The cubic root of 1520139 is about 114.9814462821.

The spelling of 1520139 in words is "one million, five hundred twenty thousand, one hundred thirty-nine".