121425660 has 72 divisors (see below), whose sum is σ = 370458816. Its totient is φ = 32192640.

The previous prime is 121425659. The next prime is 121425683. The reversal of 121425660 is 66524121.

It is a congruent number.

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, 30717 + ... + 34443.

Almost surely, 2^121425660 is an apocalyptic number.

121425660 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 121425660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185229408).

121425660 is an abundant number, since it is smaller than the sum of its proper divisors (249033156).

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

121425660 is a wasteful number, since it uses less digits than its factorization.

121425660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3923 (or 3918 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 121425660 is about 11019.3311956761. The cubic root of 121425660 is about 495.1880522101.

Adding to 121425660 its reverse (66524121), we get a palindrome (187949781).

The spelling of 121425660 in words is "one hundred twenty-one million, four hundred twenty-five thousand, six hundred sixty".