121261740 has 24 divisors (see below), whose sum is σ = 339533040. Its totient is φ = 32336448.

The previous prime is 121261729. The next prime is 121261757. The reversal of 121261740 is 47162121.

It is a self number, because there is not a number n which added to its sum of digits gives 121261740.

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, 1010455 + ... + 1010574.

It is an arithmetic number, because the mean of its divisors is an integer number (14147210).

Almost surely, 2^121261740 is an apocalyptic number.

121261740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121261740 is an abundant number, since it is smaller than the sum of its proper divisors (218271300).

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

121261740 is a wasteful number, since it uses less digits than its factorization.

121261740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2021041 (or 2021039 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 121261740 is about 11011.8908458085. The cubic root of 121261740 is about 494.9651235503.

The spelling of 121261740 in words is "one hundred twenty-one million, two hundred sixty-one thousand, seven hundred forty".