122540515 has 16 divisors (see below), whose sum is σ = 155364480. Its totient is φ = 92632960.

The previous prime is 122540479. The next prime is 122540543. The reversal of 122540515 is 515045221.

It is not a de Polignac number, because 122540515 - 2¹³ = 122532323 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122540515.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2176 + ... + 15805.

It is an arithmetic number, because the mean of its divisors is an integer number (9710280).

Almost surely, 2^122540515 is an apocalyptic number.

122540515 is a deficient number, since it is larger than the sum of its proper divisors (32823965).

122540515 is a wasteful number, since it uses less digits than its factorization.

122540515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18062.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 122540515 is about 11069.8019404143. The cubic root of 122540515 is about 496.6989406431.

Adding to 122540515 its reverse (515045221), we get a palindrome (637585736).

The spelling of 122540515 in words is "one hundred twenty-two million, five hundred forty thousand, five hundred fifteen".