2157426 has 24 divisors (see below), whose sum is σ = 4836780. Its totient is φ = 694176.

The previous prime is 2157413. The next prime is 2157427. The reversal of 2157426 is 6247512.

2157426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2117025 + 40401 = 1455^2 + 201^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 2157426.

It is not an unprimeable number, because it can be changed into a prime (2157427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1545 + ... + 2588.

2^2157426 is an apocalyptic number.

2157426 is an abundant number, since it is smaller than the sum of its proper divisors (2679354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2157426 is a wasteful number, since it uses less digits than its factorization.

2157426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4170 (or 4167 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 2157426 is about 1468.8178920479. The cubic root of 2157426 is about 129.2147136320.

The spelling of 2157426 in words is "two million, one hundred fifty-seven thousand, four hundred twenty-six".