122778087 has 16 divisors (see below), whose sum is σ = 166241280. Its totient is φ = 80589600.

The previous prime is 122778079. The next prime is 122778091. The reversal of 122778087 is 780877221.

It is not a de Polignac number, because 122778087 - 2³ = 122778079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122778017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149137 + ... + 149957.

It is an arithmetic number, because the mean of its divisors is an integer number (10390080).

Almost surely, 2^122778087 is an apocalyptic number.

122778087 is a deficient number, since it is larger than the sum of its proper divisors (43463193).

122778087 is an equidigital number, since it uses as much as digits as its factorization.

122778087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1534.

The product of its (nonzero) digits is 87808, while the sum is 42.

The square root of 122778087 is about 11080.5273791458. The cubic root of 122778087 is about 497.0197204962.

The spelling of 122778087 in words is "one hundred twenty-two million, seven hundred seventy-eight thousand, eighty-seven".