56121007 has 2 divisors, whose sum is σ = 56121008. Its totient is φ = 56121006.

The previous prime is 56121001. The next prime is 56121017. The reversal of 56121007 is 70012165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56121007 - 2¹⁹ = 55596719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56121001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28060503 + 28060504.

It is an arithmetic number, because the mean of its divisors is an integer number (28060504).

Almost surely, 2^56121007 is an apocalyptic number.

56121007 is a deficient number, since it is larger than the sum of its proper divisors (1).

56121007 is an equidigital number, since it uses as much as digits as its factorization.

56121007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 56121007 is about 7491.3955308741. The cubic root of 56121007 is about 382.8616074289.

The spelling of 56121007 in words is "fifty-six million, one hundred twenty-one thousand, seven".