121440452 has 24 divisors (see below), whose sum is σ = 257169024. Its totient is φ = 48984192.

The previous prime is 121440421. The next prime is 121440463. The reversal of 121440452 is 254044121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127088 + ... + 128039.

It is an arithmetic number, because the mean of its divisors is an integer number (10715376).

Almost surely, 2^121440452 is an apocalyptic number.

It is an amenable number.

121440452 is an abundant number, since it is smaller than the sum of its proper divisors (135728572).

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

121440452 is a wasteful number, since it uses less digits than its factorization.

121440452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255155 (or 255153 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 121440452 is about 11020.0023593464. The cubic root of 121440452 is about 495.2081592294.

Adding to 121440452 its reverse (254044121), we get a palindrome (375484573).

The spelling of 121440452 in words is "one hundred twenty-one million, four hundred forty thousand, four hundred fifty-two".