122638381 has 4 divisors (see below), whose sum is σ = 122699232. Its totient is φ = 122577532.

The previous prime is 122638337. The next prime is 122638423. The reversal of 122638381 is 183836221.

It is a happy number.

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 122638381 - 2⁷ = 122638253 is a prime.

It is a super-2 number, since 2×122638381² = 30080344988602322, 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 (122638301) 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, 27295 + ... + 31468.

It is an arithmetic number, because the mean of its divisors is an integer number (30674808).

Almost surely, 2^122638381 is an apocalyptic number.

It is an amenable number.

122638381 is a deficient number, since it is larger than the sum of its proper divisors (60851).

122638381 is an equidigital number, since it uses as much as digits as its factorization.

122638381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60850.

The product of its digits is 13824, while the sum is 34.

The square root of 122638381 is about 11074.2214624776. The cubic root of 122638381 is about 496.8311336668.

The spelling of 122638381 in words is "one hundred twenty-two million, six hundred thirty-eight thousand, three hundred eighty-one".