121400769 has 16 divisors (see below), whose sum is σ = 186346368. Its totient is φ = 68863872.

The previous prime is 121400761. The next prime is 121400779. The reversal of 121400769 is 967004121.

It is a happy number.

It is not a de Polignac number, because 121400769 - 2³ = 121400761 is a prime.

It is a super-2 number, since 2×121400769² = 29476293427582722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121400761) 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, 18222 + ... + 23975.

It is an arithmetic number, because the mean of its divisors is an integer number (11646648).

Almost surely, 2^121400769 is an apocalyptic number.

It is an amenable number.

121400769 is a deficient number, since it is larger than the sum of its proper divisors (64945599).

121400769 is a wasteful number, since it uses less digits than its factorization.

121400769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42344.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 121400769 is about 11018.2017135284. The cubic root of 121400769 is about 495.1542137608.

The spelling of 121400769 in words is "one hundred twenty-one million, four hundred thousand, seven hundred sixty-nine".