121647253 has 54 divisors (see below), whose sum is σ = 168133014. Its totient is φ = 87218208.

The previous prime is 121647221. The next prime is 121647263. The reversal of 121647253 is 352746121.

It can be written as a sum of positive squares in only one way, i.e., 84217329 + 37429924 = 9177^2 + 6118^2 .

It is not a de Polignac number, because 121647253 - 2⁵ = 121647221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121647263) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 5289000 + ... + 5289022.

Almost surely, 2^121647253 is an apocalyptic number.

121647253 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

121647253 is a deficient number, since it is larger than the sum of its proper divisors (46485761).

121647253 is a wasteful number, since it uses less digits than its factorization.

121647253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 62 counting only the distinct ones).

The product of its digits is 10080, while the sum is 31.

The square root of 121647253 is about 11029.3813516443. The cubic root of 121647253 is about 495.4890965522.

The spelling of 121647253 in words is "one hundred twenty-one million, six hundred forty-seven thousand, two hundred fifty-three".