122420581 has 4 divisors (see below), whose sum is σ = 126369664. Its totient is φ = 118471500.

The previous prime is 122420579. The next prime is 122420609. The reversal of 122420581 is 185024221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 122420581 - 2¹ = 122420579 is a prime.

It is a super-2 number, since 2×122420581² = 29973597304755122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122420521) 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, 1974495 + ... + 1974556.

It is an arithmetic number, because the mean of its divisors is an integer number (31592416).

Almost surely, 2^122420581 is an apocalyptic number.

It is an amenable number.

122420581 is a deficient number, since it is larger than the sum of its proper divisors (3949083).

122420581 is an equidigital number, since it uses as much as digits as its factorization.

122420581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3949082.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 122420581 is about 11064.3834441870. The cubic root of 122420581 is about 496.5368431360.

The spelling of 122420581 in words is "one hundred twenty-two million, four hundred twenty thousand, five hundred eighty-one".