1522139 has 4 divisors (see below), whose sum is σ = 1525224. Its totient is φ = 1519056.

The previous prime is 1522127. The next prime is 1522153. The reversal of 1522139 is 9312251.

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 1522139 - 2¹⁶ = 1456603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1522159) 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, 617 + ... + 1850.

It is an arithmetic number, because the mean of its divisors is an integer number (381306).

2^1522139 is an apocalyptic number.

1522139 is a deficient number, since it is larger than the sum of its proper divisors (3085).

1522139 is an equidigital number, since it uses as much as digits as its factorization.

1522139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3084.

The product of its digits is 540, while the sum is 23.

The square root of 1522139 is about 1233.7499746707. The cubic root of 1522139 is about 115.0318500313.

It can be divided in two parts, 1522 and 139, that added together give a palindrome (1661).

The spelling of 1522139 in words is "one million, five hundred twenty-two thousand, one hundred thirty-nine".