122561439 has 32 divisors (see below), whose sum is σ = 219416064. Its totient is φ = 58769280.

The previous prime is 122561431. The next prime is 122561473. The reversal of 122561439 is 934165221.

It is not a de Polignac number, because 122561439 - 2³ = 122561431 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122561431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17404 + ... + 23409.

It is an arithmetic number, because the mean of its divisors is an integer number (6856752).

Almost surely, 2^122561439 is an apocalyptic number.

122561439 is a deficient number, since it is larger than the sum of its proper divisors (96854625).

122561439 is a wasteful number, since it uses less digits than its factorization.

122561439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40847.

The product of its digits is 12960, while the sum is 33.

The square root of 122561439 is about 11070.7469937670. The cubic root of 122561439 is about 496.7272097619.

It can be divided in two parts, 12256 and 1439, that added together give a triangular number (13695 = T₁₆₅).

The spelling of 122561439 in words is "one hundred twenty-two million, five hundred sixty-one thousand, four hundred thirty-nine".