57021401 has 4 divisors (see below), whose sum is σ = 57203892. Its totient is φ = 56838912.

The previous prime is 57021389. The next prime is 57021407. The reversal of 57021401 is 10412075.

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

It can be written as a sum of positive squares in 2 ways, for example, as 24245776 + 32775625 = 4924^2 + 5725^2 .

It is a cyclic number.

It is not a de Polignac number, because 57021401 - 2¹⁸ = 56759257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57021407) 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, 90776 + ... + 91401.

It is an arithmetic number, because the mean of its divisors is an integer number (14300973).

Almost surely, 2^57021401 is an apocalyptic number.

It is an amenable number.

57021401 is a deficient number, since it is larger than the sum of its proper divisors (182491).

57021401 is a wasteful number, since it uses less digits than its factorization.

57021401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182490.

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

The square root of 57021401 is about 7551.2516181094. The cubic root of 57021401 is about 384.8982718804.

Adding to 57021401 its reverse (10412075), we get a palindrome (67433476).

The spelling of 57021401 in words is "fifty-seven million, twenty-one thousand, four hundred one".