40615129 has 3 divisors (see below), whose sum is σ = 40621503. Its totient is φ = 40608756.

The previous prime is 40615123. The next prime is 40615139. The reversal of 40615129 is 92151604.

The square root of 40615129 is 6373.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 33582025 + 7033104 = 5795^2 + 2652^2 .

It is not a de Polignac number, because 40615129 - 2¹¹ = 40613081 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40615097 and 40615106.

It is not an unprimeable number, because it can be changed into a prime (40615123) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3187 + ... + 9559.

It is an arithmetic number, because the mean of its divisors is an integer number (13540501).

Almost surely, 2^40615129 is an apocalyptic number.

40615129 is the 6373-rd square number.

40615129 is the 3187-th centered octagonal number.

It is an amenable number.

40615129 is a deficient number, since it is larger than the sum of its proper divisors (6374).

40615129 is an frugal number, since it uses more digits than its factorization.

40615129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12746 (or 6373 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The cubic root of 40615129 is about 343.7393718367.

The spelling of 40615129 in words is "forty million, six hundred fifteen thousand, one hundred twenty-nine".