40421325 has 72 divisors (see below), whose sum is σ = 82441152. Its totient is φ = 17364480.

The previous prime is 40421323. The next prime is 40421347. The reversal of 40421325 is 52312404.

It is not a de Polignac number, because 40421325 - 2¹ = 40421323 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40421323) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 62152 + ... + 62798.

It is an arithmetic number, because the mean of its divisors is an integer number (1145016).

Almost surely, 2^40421325 is an apocalyptic number.

It is an amenable number.

40421325 is an abundant number, since it is smaller than the sum of its proper divisors (42019827).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40421325 is a wasteful number, since it uses less digits than its factorization.

40421325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691 (or 679 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 40421325 is about 6357.7767340478. The cubic root of 40421325 is about 343.1917572773.

Adding to 40421325 its reverse (52312404), we get a palindrome (92733729).

The spelling of 40421325 in words is "forty million, four hundred twenty-one thousand, three hundred twenty-five".