2139507 has 8 divisors (see below), whose sum is σ = 3169680. Its totient is φ = 1426320.

The previous prime is 2139499. The next prime is 2139521. The reversal of 2139507 is 7059312.

It is not a de Polignac number, because 2139507 - 2³ = 2139499 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 79241 = 2139507 / (2 + 1 + 3 + 9 + 5 + 0 + 7).

It is not an unprimeable number, because it can be changed into a prime (2139107) 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, 39594 + ... + 39647.

It is an arithmetic number, because the mean of its divisors is an integer number (396210).

2^2139507 is an apocalyptic number.

2139507 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

2139507 is a deficient number, since it is larger than the sum of its proper divisors (1030173).

2139507 is an equidigital number, since it uses as much as digits as its factorization.

2139507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79250 (or 79244 counting only the distinct ones).

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

The square root of 2139507 is about 1462.7053701959. The cubic root of 2139507 is about 128.8559777191.

The spelling of 2139507 in words is "two million, one hundred thirty-nine thousand, five hundred seven".