57354721 has 4 divisors (see below), whose sum is σ = 59332500. Its totient is φ = 55376944.

The previous prime is 57354697. The next prime is 57354727. The reversal of 57354721 is 12745375.

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 32901696 + 24453025 = 5736^2 + 4945^2 .

It is a cyclic number.

It is not a de Polignac number, because 57354721 - 2⁷ = 57354593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57354727) 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, 988846 + ... + 988903.

It is an arithmetic number, because the mean of its divisors is an integer number (14833125).

Almost surely, 2^57354721 is an apocalyptic number.

It is an amenable number.

57354721 is a deficient number, since it is larger than the sum of its proper divisors (1977779).

57354721 is a wasteful number, since it uses less digits than its factorization.

57354721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977778.

The product of its digits is 29400, while the sum is 34.

The square root of 57354721 is about 7573.2899720003. The cubic root of 57354721 is about 385.6467927043.

The spelling of 57354721 in words is "fifty-seven million, three hundred fifty-four thousand, seven hundred twenty-one".