2142931 has 4 divisors (see below), whose sum is σ = 2449072. Its totient is φ = 1836792.

The previous prime is 2142923. The next prime is 2142941. The reversal of 2142931 is 1392412.

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 2142931 - 2³ = 2142923 is a prime.

It is a super-2 number, since 2×2142931² = 9184306541522, which contains 22 as substring.

It is a Duffinian number.

2142931 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2142911) 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, 153060 + ... + 153073.

It is an arithmetic number, because the mean of its divisors is an integer number (612268).

2^2142931 is an apocalyptic number.

2142931 is a deficient number, since it is larger than the sum of its proper divisors (306141).

2142931 is an equidigital number, since it uses as much as digits as its factorization.

2142931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306140.

The product of its digits is 432, while the sum is 22.

The square root of 2142931 is about 1463.8753362223. The cubic root of 2142931 is about 128.9246801062.

The spelling of 2142931 in words is "two million, one hundred forty-two thousand, nine hundred thirty-one".