2139351 has 4 divisors (see below), whose sum is σ = 2852472. Its totient is φ = 1426232.

The previous prime is 2139337. The next prime is 2139353. The reversal of 2139351 is 1539312.

It is a happy number.

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 2139351 - 2¹⁰ = 2138327 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139353) 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, 356556 + ... + 356561.

It is an arithmetic number, because the mean of its divisors is an integer number (713118).

2^2139351 is an apocalyptic number.

2139351 is a deficient number, since it is larger than the sum of its proper divisors (713121).

2139351 is an equidigital number, since it uses as much as digits as its factorization.

2139351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713120.

The product of its digits is 810, while the sum is 24.

The square root of 2139351 is about 1462.6520433787. The cubic root of 2139351 is about 128.8528458417.

The spelling of 2139351 in words is "two million, one hundred thirty-nine thousand, three hundred fifty-one".