2120431 has 8 divisors (see below), whose sum is σ = 2221184. Its totient is φ = 2021760.

The previous prime is 2120429. The next prime is 2120453. The reversal of 2120431 is 1340212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 7-Lehmer number, since φ(2120431) divides (2120431-1)⁷.

It is a cyclic number.

It is not a de Polignac number, because 2120431 - 2¹ = 2120429 is a prime.

It is a super-2 number, since 2×2120431² = 8992455251522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120411) 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, 1795 + ... + 2731.

It is an arithmetic number, because the mean of its divisors is an integer number (277648).

2^2120431 is an apocalyptic number.

2120431 is a deficient number, since it is larger than the sum of its proper divisors (100753).

2120431 is an equidigital number, since it uses as much as digits as its factorization.

2120431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2120431 is about 1456.1699763420. The cubic root of 2120431 is about 128.4718707827.

Adding to 2120431 its reverse (1340212), we get a palindrome (3460643).

The spelling of 2120431 in words is "two million, one hundred twenty thousand, four hundred thirty-one".