121657630 has 16 divisors (see below), whose sum is σ = 221757120. Its totient is φ = 48046752.

The previous prime is 121657597. The next prime is 121657637. The reversal of 121657630 is 36756121.

It is a junction number, because it is equal to n+sod(n) for n = 121657592 and 121657601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121657637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76209 + ... + 77788.

It is an arithmetic number, because the mean of its divisors is an integer number (13859820).

Almost surely, 2^121657630 is an apocalyptic number.

121657630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121657630 is a deficient number, since it is larger than the sum of its proper divisors (100099490).

121657630 is a wasteful number, since it uses less digits than its factorization.

121657630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154083.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 121657630 is about 11029.8517669097. The cubic root of 121657630 is about 495.5031852226.

The spelling of 121657630 in words is "one hundred twenty-one million, six hundred fifty-seven thousand, six hundred thirty".