422861521 has 4 divisors (see below), whose sum is σ = 423995572. Its totient is φ = 421727472.

The previous prime is 422861501. The next prime is 422861531. The reversal of 422861521 is 125168224.

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

It can be written as a sum of positive squares in 2 ways, for example, as 251539600 + 171321921 = 15860^2 + 13089^2 .

It is a cyclic number.

It is not a de Polignac number, because 422861521 - 2⁵ = 422861489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (422861501) 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, 566466 + ... + 567211.

It is an arithmetic number, because the mean of its divisors is an integer number (105998893).

Almost surely, 2^422861521 is an apocalyptic number.

It is an amenable number.

422861521 is a deficient number, since it is larger than the sum of its proper divisors (1134051).

422861521 is a wasteful number, since it uses less digits than its factorization.

422861521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134050.

The product of its digits is 7680, while the sum is 31.

The square root of 422861521 is about 20563.5969859361. The cubic root of 422861521 is about 750.5841499440.

The spelling of 422861521 in words is "four hundred twenty-two million, eight hundred sixty-one thousand, five hundred twenty-one".