121041540 has 60 divisors (see below), whose sum is σ = 379716876. Its totient is φ = 32277312.

The previous prime is 121041499. The next prime is 121041587. The reversal of 121041540 is 45140121.

121041540 is a `hidden beast` number, since 1 + 210 + 415 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 53670276 + 67371264 = 7326^2 + 8208^2 .

It is a tau number, because it is divible by the number of its divisors (60).

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 35739 + ... + 38978.

Almost surely, 2^121041540 is an apocalyptic number.

121041540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121041540 is an abundant number, since it is smaller than the sum of its proper divisors (258675336).

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

121041540 is a wasteful number, since it uses less digits than its factorization.

121041540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74738 (or 74727 counting only the distinct ones).

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

The square root of 121041540 is about 11001.8880197901. Note that the first 3 decimals coincide. The cubic root of 121041540 is about 494.6653385301.

Adding to 121041540 its reverse (45140121), we get a palindrome (166181661).

The spelling of 121041540 in words is "one hundred twenty-one million, forty-one thousand, five hundred forty".