121542600 has 96 divisors (see below), whose sum is σ = 379350720. Its totient is φ = 32190720.

The previous prime is 121542587. The next prime is 121542613. The reversal of 121542600 is 6245121.

It is an interprime number because it is at equal distance from previous prime (121542587) and next prime (121542613).

It is a super-2 number, since 2×121542600² = 29545207229520000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99594 + ... + 100806.

It is an arithmetic number, because the mean of its divisors is an integer number (3951570).

Almost surely, 2^121542600 is an apocalyptic number.

121542600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121542600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189675360).

121542600 is an abundant number, since it is smaller than the sum of its proper divisors (257808120).

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

121542600 is a wasteful number, since it uses less digits than its factorization.

121542600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399 (or 1390 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 121542600 is about 11024.6360484145. The cubic root of 121542600 is about 495.3469662085.

Adding to 121542600 its reverse (6245121), we get a palindrome (127787721).

The spelling of 121542600 in words is "one hundred twenty-one million, five hundred forty-two thousand, six hundred".