40002129 has 12 divisors (see below), whose sum is σ = 60293376. Its totient is φ = 25508472.

The previous prime is 40002103. The next prime is 40002133. The reversal of 40002129 is 92120004.

It is not a de Polignac number, because 40002129 - 2¹⁶ = 39936593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40002199) 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, 96417 + ... + 96830.

It is an arithmetic number, because the mean of its divisors is an integer number (5024448).

Almost surely, 2^40002129 is an apocalyptic number.

It is an amenable number.

40002129 is a deficient number, since it is larger than the sum of its proper divisors (20291247).

40002129 is a wasteful number, since it uses less digits than its factorization.

40002129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193276 (or 193273 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 40002129 is about 6324.7236303257. The cubic root of 40002129 is about 342.0012567923.

The spelling of 40002129 in words is "forty million, two thousand, one hundred twenty-nine".