121352440 has 64 divisors (see below), whose sum is σ = 299052000. Its totient is φ = 43952640.

The previous prime is 121352431. The next prime is 121352459. The reversal of 121352440 is 44253121.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170806 + ... + 171514.

Almost surely, 2^121352440 is an apocalyptic number.

121352440 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 121352440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149526000).

121352440 is an abundant number, since it is smaller than the sum of its proper divisors (177699560).

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

121352440 is a wasteful number, since it uses less digits than its factorization.

121352440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120 (or 1116 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 121352440 is about 11016.0083514856. The cubic root of 121352440 is about 495.0884989541.

The spelling of 121352440 in words is "one hundred twenty-one million, three hundred fifty-two thousand, four hundred forty".