2157626 has 4 divisors (see below), whose sum is σ = 3236442. Its totient is φ = 1078812.

The previous prime is 2157587. The next prime is 2157641. The reversal of 2157626 is 6267512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1155625 + 1002001 = 1075^2 + 1001^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 539405 + ... + 539408.

2^2157626 is an apocalyptic number.

2157626 is a deficient number, since it is larger than the sum of its proper divisors (1078816).

2157626 is a wasteful number, since it uses less digits than its factorization.

2157626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078815.

The product of its digits is 5040, while the sum is 29.

The square root of 2157626 is about 1468.8859724294. The cubic root of 2157626 is about 129.2187063752.

The spelling of 2157626 in words is "two million, one hundred fifty-seven thousand, six hundred twenty-six".