122540665 has 16 divisors (see below), whose sum is σ = 165247488. Its totient is φ = 86556096.

The previous prime is 122540657. The next prime is 122540681. The reversal of 122540665 is 566045221.

It is a cyclic number.

It is not a de Polignac number, because 122540665 - 2³ = 122540657 is a prime.

It is a Duffinian number.

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, 39489 + ... + 42478.

It is an arithmetic number, because the mean of its divisors is an integer number (10327968).

Almost surely, 2^122540665 is an apocalyptic number.

It is an amenable number.

122540665 is a deficient number, since it is larger than the sum of its proper divisors (42706823).

122540665 is a wasteful number, since it uses less digits than its factorization.

122540665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82008.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 122540665 is about 11069.8087156012. The cubic root of 122540665 is about 496.6991433102.

Adding to 122540665 its reverse (566045221), we get a palindrome (688585886).

The spelling of 122540665 in words is "one hundred twenty-two million, five hundred forty thousand, six hundred sixty-five".