121506240 has 112 divisors (see below), whose sum is σ = 402628608. Its totient is φ = 30987264.

The previous prime is 121506239. The next prime is 121506241. The reversal of 121506240 is 42605121.

It is an interprime number because it is at equal distance from previous prime (121506239) and next prime (121506241).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121506241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19329 + ... + 24831.

Almost surely, 2^121506240 is an apocalyptic number.

121506240 is a gapful number since it is divisible by the number (10) 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 121506240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201314304).

121506240 is an abundant number, since it is smaller than the sum of its proper divisors (281122368).

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

121506240 is a wasteful number, since it uses less digits than its factorization.

121506240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5546 (or 5536 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 121506240 is about 11022.9868910382. The cubic root of 121506240 is about 495.2975662121.

The spelling of 121506240 in words is "one hundred twenty-one million, five hundred six thousand, two hundred forty".