1371539 has 4 divisors (see below), whose sum is σ = 1477056. Its totient is φ = 1266024.

The previous prime is 1371511. The next prime is 1371541. The reversal of 1371539 is 9351731.

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

It is a cyclic number.

It is not a de Polignac number, because 1371539 - 2²⁰ = 322963 is a prime.

It is a super-2 number, since 2×1371539² = 3762238457042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1371569) 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, 52739 + ... + 52764.

It is an arithmetic number, because the mean of its divisors is an integer number (369264).

2^1371539 is an apocalyptic number.

1371539 is a deficient number, since it is larger than the sum of its proper divisors (105517).

1371539 is a wasteful number, since it uses less digits than its factorization.

1371539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105516.

The product of its digits is 2835, while the sum is 29.

The square root of 1371539 is about 1171.1272347614. The cubic root of 1371539 is about 111.1056268034.

The spelling of 1371539 in words is "one million, three hundred seventy-one thousand, five hundred thirty-nine".