121716045 has 96 divisors (see below), whose sum is σ = 243734400. Its totient is φ = 55641600.

The previous prime is 121716017. The next prime is 121716047. The reversal of 121716045 is 540617121.

It is a happy number.

It is not a de Polignac number, because 121716045 - 2¹² = 121711949 is a prime.

It is a super-2 number, since 2×121716045² = 29629591220884050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121716047) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 875586 + ... + 875724.

It is an arithmetic number, because the mean of its divisors is an integer number (2538900).

Almost surely, 2^121716045 is an apocalyptic number.

121716045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121716045 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

121716045 is a wasteful number, since it uses less digits than its factorization.

121716045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251 (or 248 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 121716045 is about 11032.4994901427. The cubic root of 121716045 is about 495.5824792959.

The spelling of 121716045 in words is "one hundred twenty-one million, seven hundred sixteen thousand, forty-five".