121861630 has 64 divisors (see below), whose sum is σ = 254016000. Its totient is φ = 41627520.

The previous prime is 121861603. The next prime is 121861633. The reversal of 121861630 is 36168121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121861633) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 415764 + ... + 416056.

It is an arithmetic number, because the mean of its divisors is an integer number (3969000).

Almost surely, 2^121861630 is an apocalyptic number.

121861630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121861630 is an abundant number, since it is smaller than the sum of its proper divisors (132154370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121861630 is a wasteful number, since it uses less digits than its factorization.

121861630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 121861630 is about 11039.0955245437. The cubic root of 121861630 is about 495.7799898988.

The spelling of 121861630 in words is "one hundred twenty-one million, eight hundred sixty-one thousand, six hundred thirty".