121461640 has 32 divisors (see below), whose sum is σ = 274680000. Its totient is φ = 48337344.

The previous prime is 121461611. The next prime is 121461647. The reversal of 121461640 is 46164121.

It is not an unprimeable number, because it can be changed into a prime (121461647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331 + ... + 15589.

It is an arithmetic number, because the mean of its divisors is an integer number (8583750).

Almost surely, 2^121461640 is an apocalyptic number.

121461640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121461640 is an abundant number, since it is smaller than the sum of its proper divisors (153218360).

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

121461640 is a wasteful number, since it uses less digits than its factorization.

121461640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15469 (or 15465 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 121461640 is about 11020.9636602250. The cubic root of 121461640 is about 495.2369575969.

The spelling of 121461640 in words is "one hundred twenty-one million, four hundred sixty-one thousand, six hundred forty".