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57120641 = 431328387
BaseRepresentation
bin1101100111100…
…1011110000001
310222111000210022
43121321132001
5104110330031
65400143225
71262342324
oct331713601
9128430708
1057120641
112a274646
1217167b15
13baac4c6
14782c7bb
15503497b
hex3679781

57120641 has 4 divisors (see below), whose sum is σ = 58449072. Its totient is φ = 55792212.

The previous prime is 57120599. The next prime is 57120647. The reversal of 57120641 is 14602175.

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 a cyclic number.

It is not a de Polignac number, because 57120641 - 26 = 57120577 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57120641.

It is not an unprimeable number, because it can be changed into a prime (57120647) 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, 664151 + ... + 664236.

It is an arithmetic number, because the mean of its divisors is an integer number (14612268).

Almost surely, 257120641 is an apocalyptic number.

It is an amenable number.

57120641 is a deficient number, since it is larger than the sum of its proper divisors (1328431).

57120641 is a wasteful number, since it uses less digits than its factorization.

57120641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328430.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 57120641 is about 7557.8198576044. The cubic root of 57120641 is about 385.1214346796.

It can be divided in two parts, 571 and 20641, that added together give a palindrome (21212).

The spelling of 57120641 in words is "fifty-seven million, one hundred twenty thousand, six hundred forty-one".

Divisors: 1 43 1328387 57120641