40021125 has 64 divisors (see below), whose sum is σ = 72334080. Its totient is φ = 19584000.

The previous prime is 40021123. The next prime is 40021147. The reversal of 40021125 is 52112004.

It is not a de Polignac number, because 40021125 - 2¹ = 40021123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40021123) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 292057 + ... + 292193.

It is an arithmetic number, because the mean of its divisors is an integer number (1130220).

Almost surely, 2^40021125 is an apocalyptic number.

It is an amenable number.

40021125 is a deficient number, since it is larger than the sum of its proper divisors (32312955).

40021125 is a wasteful number, since it uses less digits than its factorization.

40021125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 40021125 is about 6326.2251777818. The cubic root of 40021125 is about 342.0553841429.

Adding to 40021125 its reverse (52112004), we get a palindrome (92133129).

The spelling of 40021125 in words is "forty million, twenty-one thousand, one hundred twenty-five".