2122157 has 4 divisors (see below), whose sum is σ = 2126880. Its totient is φ = 2117436.

The previous prime is 2122151. The next prime is 2122163. The reversal of 2122157 is 7512212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (2122151) and next prime (2122163).

It is a cyclic number.

It is not a de Polignac number, because 2122157 - 2¹⁸ = 1860013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122151) 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, 1607 + ... + 2612.

It is an arithmetic number, because the mean of its divisors is an integer number (531720).

2^2122157 is an apocalyptic number.

It is an amenable number.

2122157 is a deficient number, since it is larger than the sum of its proper divisors (4723).

2122157 is an equidigital number, since it uses as much as digits as its factorization.

2122157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4722.

The product of its digits is 280, while the sum is 20.

The square root of 2122157 is about 1456.7625063819. The cubic root of 2122157 is about 128.5067194072.

Adding to 2122157 its reverse (7512212), we get a palindrome (9634369).

The spelling of 2122157 in words is "two million, one hundred twenty-two thousand, one hundred fifty-seven".