40001525 has 6 divisors (see below), whose sum is σ = 49601922. Its totient is φ = 32001200.

The previous prime is 40001519. The next prime is 40001557. The reversal of 40001525 is 52510004.

It can be written as a sum of positive squares in 3 ways, for example, as 550564 + 39450961 = 742^2 + 6281^2 .

It is not a de Polignac number, because 40001525 - 2⁴ = 40001509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 800006 + ... + 800055.

It is an arithmetic number, because the mean of its divisors is an integer number (8266987).

Almost surely, 2^40001525 is an apocalyptic number.

It is an amenable number.

40001525 is a deficient number, since it is larger than the sum of its proper divisors (9600397).

40001525 is a wasteful number, since it uses less digits than its factorization.

40001525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1600071 (or 1600066 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 40001525 is about 6324.6758810235. The cubic root of 40001525 is about 341.9995354690. Note that the first 3 decimals are identical.

Adding to 40001525 its reverse (52510004), we get a palindrome (92511529).

The spelling of 40001525 in words is "forty million, one thousand, five hundred twenty-five".