2139207 has 32 divisors (see below), whose sum is σ = 3514368. Its totient is φ = 1130976.

The previous prime is 2139199. The next prime is 2139211. The reversal of 2139207 is 7029312.

It is not a de Polignac number, because 2139207 - 2³ = 2139199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20718 + ... + 20820.

It is an arithmetic number, because the mean of its divisors is an integer number (109824).

2^2139207 is an apocalyptic number.

2139207 is a deficient number, since it is larger than the sum of its proper divisors (1375161).

2139207 is a wasteful number, since it uses less digits than its factorization.

2139207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 2139207 is about 1462.6028168987. The cubic root of 2139207 is about 128.8499547428.

It can be divided in two parts, 2139 and 207, that added together give a triangular number (2346 = T₆₈).

The spelling of 2139207 in words is "two million, one hundred thirty-nine thousand, two hundred seven".