56121445 has 4 divisors (see below), whose sum is σ = 67345740. Its totient is φ = 44897152.

The previous prime is 56121433. The next prime is 56121463. The reversal of 56121445 is 54412165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54412165 = 5 ⋅10882433.

It can be written as a sum of positive squares in 2 ways, for example, as 6320196 + 49801249 = 2514^2 + 7057^2 .

It is a cyclic number.

It is not a de Polignac number, because 56121445 - 2⁵ = 56121413 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5612140 + ... + 5612149.

It is an arithmetic number, because the mean of its divisors is an integer number (16836435).

Almost surely, 2^56121445 is an apocalyptic number.

It is an amenable number.

56121445 is a deficient number, since it is larger than the sum of its proper divisors (11224295).

56121445 is a wasteful number, since it uses less digits than its factorization.

56121445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11224294.

The product of its digits is 4800, while the sum is 28.

The square root of 56121445 is about 7491.4247643556. The cubic root of 56121445 is about 382.8626034490.

The spelling of 56121445 in words is "fifty-six million, one hundred twenty-one thousand, four hundred forty-five".