121257770 has 16 divisors (see below), whose sum is σ = 231103368. Its totient is φ = 45649920.

The previous prime is 121257761. The next prime is 121257781. The reversal of 121257770 is 77752121.

It can be written as a sum of positive squares in 4 ways, for example, as 99420841 + 21836929 = 9971^2 + 4673^2 .

It is a Curzon number.

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, 356471 + ... + 356810.

Almost surely, 2^121257770 is an apocalyptic number.

121257770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121257770 is a deficient number, since it is larger than the sum of its proper divisors (109845598).

121257770 is a wasteful number, since it uses less digits than its factorization.

121257770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713305.

The product of its (nonzero) digits is 6860, while the sum is 32.

The square root of 121257770 is about 11011.7105846458. The cubic root of 121257770 is about 494.9597219208.

The spelling of 121257770 in words is "one hundred twenty-one million, two hundred fifty-seven thousand, seven hundred seventy".