122557387 has 4 divisors (see below), whose sum is σ = 122583016. Its totient is φ = 122531760.

The previous prime is 122557373. The next prime is 122557397. The reversal of 122557387 is 783755221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122557387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122557327) 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, 3273 + ... + 15994.

It is an arithmetic number, because the mean of its divisors is an integer number (30645754).

Almost surely, 2^122557387 is an apocalyptic number.

122557387 is a deficient number, since it is larger than the sum of its proper divisors (25629).

122557387 is an equidigital number, since it uses as much as digits as its factorization.

122557387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25628.

The product of its digits is 117600, while the sum is 40.

The square root of 122557387 is about 11070.5639874398. The cubic root of 122557387 is about 496.7217356072.

The spelling of 122557387 in words is "one hundred twenty-two million, five hundred fifty-seven thousand, three hundred eighty-seven".