122251405 has 4 divisors (see below), whose sum is σ = 146701692. Its totient is φ = 97801120.

The previous prime is 122251399. The next prime is 122251429. The reversal of 122251405 is 504152221.

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 57320041 + 64931364 = 7571^2 + 8058^2 .

It is not a de Polignac number, because 122251405 - 2⁵ = 122251373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12225136 + ... + 12225145.

It is an arithmetic number, because the mean of its divisors is an integer number (36675423).

Almost surely, 2^122251405 is an apocalyptic number.

It is an amenable number.

122251405 is a deficient number, since it is larger than the sum of its proper divisors (24450287).

122251405 is an equidigital number, since it uses as much as digits as its factorization.

122251405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24450286.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 122251405 is about 11056.7357298617. The cubic root of 122251405 is about 496.3080122186.

The spelling of 122251405 in words is "one hundred twenty-two million, two hundred fifty-one thousand, four hundred five".