121487292 has 72 divisors (see below), whose sum is σ = 330220800. Its totient is φ = 37538208.

The previous prime is 121487291. The next prime is 121487297. The reversal of 121487292 is 292784121.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121487291) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30259 + ... + 34037.

It is an arithmetic number, because the mean of its divisors is an integer number (4586400).

Almost surely, 2^121487292 is an apocalyptic number.

121487292 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121487292, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165110400).

121487292 is an abundant number, since it is smaller than the sum of its proper divisors (208733508).

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

121487292 is a wasteful number, since it uses less digits than its factorization.

121487292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3855 (or 3850 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 121487292 is about 11022.1273808644. The cubic root of 121487292 is about 495.2718188756.

The spelling of 121487292 in words is "one hundred twenty-one million, four hundred eighty-seven thousand, two hundred ninety-two".