40020525 has 36 divisors (see below), whose sum is σ = 72578688. Its totient is φ = 21077280.

The previous prime is 40020523. The next prime is 40020527. The reversal of 40020525 is 52502004.

It is an interprime number because it is at equal distance from previous prime (40020523) and next prime (40020527).

It is not a de Polignac number, because 40020525 - 2¹ = 40020523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40020498 and 40020507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40020521) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 17604 + ... + 19746.

Almost surely, 2^40020525 is an apocalyptic number.

40020525 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40020525 is a deficient number, since it is larger than the sum of its proper divisors (32558163).

40020525 is a wasteful number, since it uses less digits than its factorization.

40020525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2242 (or 2234 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 40020525 is about 6326.1777559598. The cubic root of 40020525 is about 342.0536747602.

Adding to 40020525 its reverse (52502004), we get a palindrome (92522529).

The spelling of 40020525 in words is "forty million, twenty thousand, five hundred twenty-five".