40540129 has 8 divisors (see below), whose sum is σ = 48770240. Its totient is φ = 32919696.

The previous prime is 40540127. The next prime is 40540133. The reversal of 40540129 is 92104504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40540129 - 2¹ = 40540127 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40540127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152274 + ... + 152539.

It is an arithmetic number, because the mean of its divisors is an integer number (6096280).

Almost surely, 2^40540129 is an apocalyptic number.

It is an amenable number.

40540129 is a deficient number, since it is larger than the sum of its proper divisors (8230111).

40540129 is a wasteful number, since it uses less digits than its factorization.

40540129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304839.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 40540129 is about 6367.1130820804. The cubic root of 40540129 is about 343.5276581348.

Subtracting from 40540129 its product of nonzero digits (1440), we obtain a square (40538689 = 6367²).

The spelling of 40540129 in words is "forty million, five hundred forty thousand, one hundred twenty-nine".