56507121 has 36 divisors (see below), whose sum is σ = 94472560. Its totient is φ = 32432400.

The previous prime is 56507107. The next prime is 56507123. The reversal of 56507121 is 12170565.

56507121 is a `hidden beast` number, since 5 + 650 + 7 + 1 + 2 + 1 = 666.

It is not a de Polignac number, because 56507121 - 2⁶ = 56507057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56507123) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 19326 + ... + 22056.

Almost surely, 2^56507121 is an apocalyptic number.

It is an amenable number.

56507121 is a deficient number, since it is larger than the sum of its proper divisors (37965439).

56507121 is a wasteful number, since it uses less digits than its factorization.

56507121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2778 (or 2764 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 56507121 is about 7517.1218561362. The cubic root of 56507121 is about 383.7376340946.

Adding to 56507121 its reverse (12170565), we get a palindrome (68677686).

The spelling of 56507121 in words is "fifty-six million, five hundred seven thousand, one hundred twenty-one".