140129421 has 16 divisors (see below), whose sum is σ = 193752000. Its totient is φ = 89979008.

The previous prime is 140129411. The next prime is 140129441. The reversal of 140129421 is 124921041.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140129421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 140129391 and 140129400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140129411) 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, 38905 + ... + 42353.

It is an arithmetic number, because the mean of its divisors is an integer number (12109500).

Almost surely, 2^140129421 is an apocalyptic number.

It is an amenable number.

140129421 is a deficient number, since it is larger than the sum of its proper divisors (53622579).

140129421 is a wasteful number, since it uses less digits than its factorization.

140129421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3948.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 140129421 is about 11837.6273382803. The cubic root of 140129421 is about 519.4093651390.

The spelling of 140129421 in words is "one hundred forty million, one hundred twenty-nine thousand, four hundred twenty-one".