140399121 has 16 divisors (see below), whose sum is σ = 194376960. Its totient is φ = 90034560.

The previous prime is 140399117. The next prime is 140399123. The reversal of 140399121 is 121993041.

It is not a de Polignac number, because 140399121 - 2² = 140399117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (140399123) 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 15 ways as a sum of consecutive naturals, for example, 21576 + ... + 27318.

It is an arithmetic number, because the mean of its divisors is an integer number (12148560).

Almost surely, 2^140399121 is an apocalyptic number.

It is an amenable number.

140399121 is a deficient number, since it is larger than the sum of its proper divisors (53977839).

140399121 is a wasteful number, since it uses less digits than its factorization.

140399121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6056.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 140399121 is about 11849.0135032415. The cubic root of 140399121 is about 519.7423785525.

The spelling of 140399121 in words is "one hundred forty million, three hundred ninety-nine thousand, one hundred twenty-one".