121407400 has 24 divisors (see below), whose sum is σ = 282272670. Its totient is φ = 48562880.

The previous prime is 121407389. The next prime is 121407401. The reversal of 121407400 is 4704121.

It can be written as a sum of positive squares in 3 ways, for example, as 118330884 + 3076516 = 10878^2 + 1754^2 .

It is not an unprimeable number, because it can be changed into a prime (121407401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 303319 + ... + 303718.

Almost surely, 2^121407400 is an apocalyptic number.

121407400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121407400 is an abundant number, since it is smaller than the sum of its proper divisors (160865270).

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

121407400 is a wasteful number, since it uses less digits than its factorization.

121407400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607053 (or 607044 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 121407400 is about 11018.5026205923. The cubic root of 121407400 is about 495.1632288268.

The spelling of 121407400 in words is "one hundred twenty-one million, four hundred seven thousand, four hundred".