121542630 has 96 divisors (see below), whose sum is σ = 331527168. Its totient is φ = 28252800.

The previous prime is 121542613. The next prime is 121542643. The reversal of 121542630 is 36245121.

It is a super-2 number, since 2×121542630² = 29545221814633800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121542630.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1115016 + ... + 1115124.

It is an arithmetic number, because the mean of its divisors is an integer number (3453408).

Almost surely, 2^121542630 is an apocalyptic number.

121542630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121542630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165763584).

121542630 is an abundant number, since it is smaller than the sum of its proper divisors (209984538).

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

121542630 is a wasteful number, since it uses less digits than its factorization.

121542630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270 (or 161 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 121542630 is about 11024.6374090035. The cubic root of 121542630 is about 495.3470069635.

Adding to 121542630 its reverse (36245121), we get a palindrome (157787751).

The spelling of 121542630 in words is "one hundred twenty-one million, five hundred forty-two thousand, six hundred thirty".