140432121 has 24 divisors (see below), whose sum is σ = 217212840. Its totient is φ = 87115776.

The previous prime is 140432113. The next prime is 140432147. The reversal of 140432121 is 121234041.

It can be written as a sum of positive squares in 4 ways, for example, as 14745600 + 125686521 = 3840^2 + 11211^2 .

It is not a de Polignac number, because 140432121 - 2³ = 140432113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 140432094 and 140432103.

It is not an unprimeable number, because it can be changed into a prime (140432101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8461 + ... + 18773.

It is an arithmetic number, because the mean of its divisors is an integer number (9050535).

Almost surely, 2^140432121 is an apocalyptic number.

It is an amenable number.

140432121 is a deficient number, since it is larger than the sum of its proper divisors (76780719).

140432121 is a wasteful number, since it uses less digits than its factorization.

140432121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10425 (or 10422 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 140432121 is about 11850.4059424140. The cubic root of 140432121 is about 519.7830961741.

Adding to 140432121 its reverse (121234041), we get a palindrome (261666162).

The spelling of 140432121 in words is "one hundred forty million, four hundred thirty-two thousand, one hundred twenty-one".