121287252 has 36 divisors (see below), whose sum is σ = 292645248. Its totient is φ = 39056400.

The previous prime is 121287239. The next prime is 121287253. The reversal of 121287252 is 252782121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121287253) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 212127 + ... + 212697.

Almost surely, 2^121287252 is an apocalyptic number.

121287252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121287252 is an abundant number, since it is smaller than the sum of its proper divisors (171357996).

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

121287252 is an equidigital number, since it uses as much as digits as its factorization.

121287252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180 (or 607 counting only the distinct ones).

The product of its digits is 4480, while the sum is 30.

The square root of 121287252 is about 11013.0491690540. The cubic root of 121287252 is about 494.9998326701. Note that the first 3 decimals are identical.

The spelling of 121287252 in words is "one hundred twenty-one million, two hundred eighty-seven thousand, two hundred fifty-two".