56121602 has 4 divisors (see below), whose sum is σ = 84182406. Its totient is φ = 28060800.

The previous prime is 56121577. The next prime is 56121613. The reversal of 56121602 is 20612165.

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

It can be written as a sum of positive squares in only one way, i.e., 56085121 + 36481 = 7489^2 + 191^2 .

It is a super-2 number, since 2×56121602² = 6299268422092808, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14030399 + ... + 14030402.

Almost surely, 2^56121602 is an apocalyptic number.

56121602 is a deficient number, since it is larger than the sum of its proper divisors (28060804).

56121602 is a wasteful number, since it uses less digits than its factorization.

56121602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28060803.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 56121602 is about 7491.4352429958. The cubic root of 56121602 is about 382.8629604686.

Adding to 56121602 its reverse (20612165), we get a palindrome (76733767).

The spelling of 56121602 in words is "fifty-six million, one hundred twenty-one thousand, six hundred two".