121710645 has 24 divisors (see below), whose sum is σ = 241103616. Its totient is φ = 55639008.

The previous prime is 121710623. The next prime is 121710689. The reversal of 121710645 is 546017121.

It is a happy number.

121710645 is a `hidden beast` number, since 1 + 2 + 1 + 7 + 10 + 645 = 666.

It is not a de Polignac number, because 121710645 - 2⁹ = 121710133 is a prime.

It is a super-2 number, since 2×121710645² = 29626962212632050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 192877 + ... + 193506.

It is an arithmetic number, because the mean of its divisors is an integer number (10045984).

Almost surely, 2^121710645 is an apocalyptic number.

121710645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121710645 is a deficient number, since it is larger than the sum of its proper divisors (119392971).

121710645 is a wasteful number, since it uses less digits than its factorization.

121710645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386401 (or 386398 counting only the distinct ones).

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

The square root of 121710645 is about 11032.2547559418. The cubic root of 121710645 is about 495.5751502568.

Adding to 121710645 its reverse (546017121), we get a palindrome (667727766).

The spelling of 121710645 in words is "one hundred twenty-one million, seven hundred ten thousand, six hundred forty-five".