121541040 has 80 divisors (see below), whose sum is σ = 418648800. Its totient is φ = 32410368.

The previous prime is 121541033. The next prime is 121541047. The reversal of 121541040 is 40145121.

121541040 is a `hidden beast` number, since 1 + 215 + 410 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (121541033) and next prime (121541047).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (121541047) 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, 25975 + ... + 30294.

It is an arithmetic number, because the mean of its divisors is an integer number (5233110).

Almost surely, 2^121541040 is an apocalyptic number.

121541040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121541040 is an abundant number, since it is smaller than the sum of its proper divisors (297107760).

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

121541040 is a wasteful number, since it uses less digits than its factorization.

121541040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56291 (or 56279 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 121541040 is about 11024.5652975526. The cubic root of 121541040 is about 495.3448469390.

Adding to 121541040 its reverse (40145121), we get a palindrome (161686161).

The spelling of 121541040 in words is "one hundred twenty-one million, five hundred forty-one thousand, forty".