40129425 has 120 divisors (see below), whose sum is σ = 90024000. Its totient is φ = 17262720.

The previous prime is 40129391. The next prime is 40129433. The reversal of 40129425 is 52492104.

It is not a de Polignac number, because 40129425 - 2¹¹ = 40127377 is a prime.

It is a super-2 number, since 2×40129425² = 3220741501661250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

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 119 ways as a sum of consecutive naturals, for example, 269251 + ... + 269399.

It is an arithmetic number, because the mean of its divisors is an integer number (750200).

Almost surely, 2^40129425 is an apocalyptic number.

40129425 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40129425 is an abundant number, since it is smaller than the sum of its proper divisors (49894575).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40129425 is a wasteful number, since it uses less digits than its factorization.

40129425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 40129425 is about 6334.7790016701. The cubic root of 40129425 is about 342.3636482838.

The spelling of 40129425 in words is "forty million, one hundred twenty-nine thousand, four hundred twenty-five".