121745715 has 64 divisors (see below), whose sum is σ = 242995200. Its totient is φ = 50678784.

The previous prime is 121745699. The next prime is 121745731. The reversal of 121745715 is 517547121.

It is an interprime number because it is at equal distance from previous prime (121745699) and next prime (121745731).

It is not a de Polignac number, because 121745715 - 2⁴ = 121745699 is a prime.

It is a super-2 number, since 2×121745715² = 29644038241722450, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 107271 + ... + 108399.

It is an arithmetic number, because the mean of its divisors is an integer number (3796800).

Almost surely, 2^121745715 is an apocalyptic number.

121745715 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121745715 is a deficient number, since it is larger than the sum of its proper divisors (121249485).

121745715 is a wasteful number, since it uses less digits than its factorization.

121745715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236.

The product of its digits is 9800, while the sum is 33.

The square root of 121745715 is about 11033.8440717639. The cubic root of 121745715 is about 495.6227444271.

The spelling of 121745715 in words is "one hundred twenty-one million, seven hundred forty-five thousand, seven hundred fifteen".