121273540 has 48 divisors (see below), whose sum is σ = 261273600. Its totient is φ = 47265920.

The previous prime is 121273511. The next prime is 121273543. The reversal of 121273540 is 45372121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (121273543) 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, 202161 + ... + 202759.

It is an arithmetic number, because the mean of its divisors is an integer number (5443200).

Almost surely, 2^121273540 is an apocalyptic number.

121273540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121273540 is an abundant number, since it is smaller than the sum of its proper divisors (140000060).

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

121273540 is a wasteful number, since it uses less digits than its factorization.

121273540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852 (or 850 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 121273540 is about 11012.4266172356. The cubic root of 121273540 is about 494.9811780756.

The spelling of 121273540 in words is "one hundred twenty-one million, two hundred seventy-three thousand, five hundred forty".