121452240 has 320 divisors, whose sum is σ = 475969536. Its totient is φ = 24938496.

The previous prime is 121452229. The next prime is 121452251. The reversal of 121452240 is 42254121.

It is an interprime number because it is at equal distance from previous prime (121452229) and next prime (121452251).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1463239 + ... + 1463321.

Almost surely, 2^121452240 is an apocalyptic number.

121452240 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 121452240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237984768).

121452240 is an abundant number, since it is smaller than the sum of its proper divisors (354517296).

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

121452240 is a wasteful number, since it uses less digits than its factorization.

121452240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 121452240 is about 11020.5371919884. The cubic root of 121452240 is about 495.2241816909.

The spelling of 121452240 in words is "one hundred twenty-one million, four hundred fifty-two thousand, two hundred forty".