121662015 has 16 divisors (see below), whose sum is σ = 196384608. Its totient is φ = 64311296.

The previous prime is 121661993. The next prime is 121662043. The reversal of 121662015 is 510266121.

It is a cyclic number.

It is not a de Polignac number, because 121662015 - 2⁸ = 121661759 is a prime.

It is a super-3 number, since 3×121662015³ (a number of 25 digits) contains 333 as substring.

It is a congruent 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, 34194 + ... + 37583.

It is an arithmetic number, because the mean of its divisors is an integer number (12274038).

Almost surely, 2^121662015 is an apocalyptic number.

121662015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121662015 is a deficient number, since it is larger than the sum of its proper divisors (74722593).

121662015 is a wasteful number, since it uses less digits than its factorization.

121662015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71898.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 121662015 is about 11030.0505438552. The cubic root of 121662015 is about 495.5091384191.

The spelling of 121662015 in words is "one hundred twenty-one million, six hundred sixty-two thousand, fifteen".