40921625 has 16 divisors (see below), whose sum is σ = 51302160. Its totient is φ = 32588800.

The previous prime is 40921619. The next prime is 40921627. The reversal of 40921625 is 52612904.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 27164944 + 13756681 = 5212^2 + 3709^2 .

It is not a de Polignac number, because 40921625 - 2⁶ = 40921561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40921627) 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 15 ways as a sum of consecutive naturals, for example, 33017 + ... + 34233.

It is an arithmetic number, because the mean of its divisors is an integer number (3206385).

Almost surely, 2^40921625 is an apocalyptic number.

It is an amenable number.

40921625 is a deficient number, since it is larger than the sum of its proper divisors (10380535).

40921625 is a wasteful number, since it uses less digits than its factorization.

40921625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501 (or 1491 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 40921625 is about 6397.0012505861. The cubic root of 40921625 is about 344.6018651652.

The spelling of 40921625 in words is "forty million, nine hundred twenty-one thousand, six hundred twenty-five".