140540121 has 12 divisors (see below), whose sum is σ = 203609172. Its totient is φ = 93413376.

The previous prime is 140540117. The next prime is 140540123. The reversal of 140540121 is 121045041.

140540121 is a `hidden beast` number, since 1 + 4 + 0 + 540 + 121 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 49070025 + 91470096 = 7005^2 + 9564^2 .

It is not a de Polignac number, because 140540121 - 2² = 140540117 is a prime.

It is a super-2 number, since 2×140540121² = 39503051221389282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 140540094 and 140540103.

It is not an unprimeable number, because it can be changed into a prime (140540123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20136 + ... + 26201.

It is an arithmetic number, because the mean of its divisors is an integer number (16967431).

Almost surely, 2^140540121 is an apocalyptic number.

It is an amenable number.

140540121 is a deficient number, since it is larger than the sum of its proper divisors (63069051).

140540121 is a wasteful number, since it uses less digits than its factorization.

140540121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46680 (or 46677 counting only the distinct ones).

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

The square root of 140540121 is about 11854.9618725663. The cubic root of 140540121 is about 519.9163092630.

Adding to 140540121 its reverse (121045041), we get a palindrome (261585162).

The spelling of 140540121 in words is "one hundred forty million, five hundred forty thousand, one hundred twenty-one".