140531121 has 6 divisors (see below), whose sum is σ = 202989410. Its totient is φ = 93687408.

The previous prime is 140531119. The next prime is 140531123. The reversal of 140531121 is 121135041.

140531121 is a `hidden beast` number, since 14 + 0 + 531 + 121 = 666.

It is an interprime number because it is at equal distance from previous prime (140531119) and next prime (140531123).

It can be written as a sum of positive squares in only one way, i.e., 129140496 + 11390625 = 11364^2 + 3375^2 .

It is not a de Polignac number, because 140531121 - 2¹ = 140531119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140531094 and 140531103.

It is not an unprimeable number, because it can be changed into a prime (140531123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7807276 + ... + 7807293.

Almost surely, 2^140531121 is an apocalyptic number.

It is an amenable number.

140531121 is a deficient number, since it is larger than the sum of its proper divisors (62458289).

140531121 is a wasteful number, since it uses less digits than its factorization.

140531121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15614575 (or 15614572 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 140531121 is about 11854.5822785959. The cubic root of 140531121 is about 519.9052107794.

Adding to 140531121 its reverse (121135041), we get a palindrome (261666162).

The spelling of 140531121 in words is "one hundred forty million, five hundred thirty-one thousand, one hundred twenty-one".