121577725 has 6 divisors (see below), whose sum is σ = 150756410. Its totient is φ = 97262160.

The previous prime is 121577723. The next prime is 121577737. The reversal of 121577725 is 527775121.

It can be written as a sum of positive squares in 3 ways, for example, as 4137156 + 117440569 = 2034^2 + 10837^2 .

It is not a de Polignac number, because 121577725 - 2¹ = 121577723 is a prime.

It is a super-2 number, since 2×121577725² = 29562286432351250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121577723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2431530 + ... + 2431579.

Almost surely, 2^121577725 is an apocalyptic number.

It is an amenable number.

121577725 is a deficient number, since it is larger than the sum of its proper divisors (29178685).

121577725 is an equidigital number, since it uses as much as digits as its factorization.

121577725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4863119 (or 4863114 counting only the distinct ones).

The product of its digits is 34300, while the sum is 37.

The square root of 121577725 is about 11026.2289564474. The cubic root of 121577725 is about 495.3946789347.

The spelling of 121577725 in words is "one hundred twenty-one million, five hundred seventy-seven thousand, seven hundred twenty-five".