121599436 has 96 divisors (see below), whose sum is σ = 278691840. Its totient is φ = 45179904.

The previous prime is 121599433. The next prime is 121599461. The reversal of 121599436 is 634995121.

It is not an unprimeable number, because it can be changed into a prime (121599433) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 317301 + ... + 317683.

It is an arithmetic number, because the mean of its divisors is an integer number (2903040).

Almost surely, 2^121599436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121599436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139345920).

121599436 is an abundant number, since it is smaller than the sum of its proper divisors (157092404).

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

121599436 is a wasteful number, since it uses less digits than its factorization.

121599436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463 (or 461 counting only the distinct ones).

The product of its digits is 58320, while the sum is 40.

The square root of 121599436 is about 11027.2134286047. The cubic root of 121599436 is about 495.4241658979.

The spelling of 121599436 in words is "one hundred twenty-one million, five hundred ninety-nine thousand, four hundred thirty-six".