121578752 has 18 divisors (see below), whose sum is σ = 242683098. Its totient is φ = 60789248.

The previous prime is 121578749. The next prime is 121578757. The reversal of 121578752 is 257875121.

It can be written as a sum of positive squares in only one way, i.e., 121528576 + 50176 = 11024^2 + 224^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121578757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 237203 + ... + 237714.

Almost surely, 2^121578752 is an apocalyptic number.

It is an amenable number.

121578752 is a deficient number, since it is larger than the sum of its proper divisors (121104346).

121578752 is an frugal number, since it uses more digits than its factorization.

121578752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474933 (or 474919 counting only the distinct ones).

The product of its digits is 39200, while the sum is 38.

The square root of 121578752 is about 11026.2755271216. The cubic root of 121578752 is about 495.3960738418.

The spelling of 121578752 in words is "one hundred twenty-one million, five hundred seventy-eight thousand, seven hundred fifty-two".