40372261 has 4 divisors (see below), whose sum is σ = 41674624. Its totient is φ = 39069900.

The previous prime is 40372259. The next prime is 40372271. The reversal of 40372261 is 16227304.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40372261 - 2¹ = 40372259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40372271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 651135 + ... + 651196.

It is an arithmetic number, because the mean of its divisors is an integer number (10418656).

Almost surely, 2^40372261 is an apocalyptic number.

It is an amenable number.

40372261 is a deficient number, since it is larger than the sum of its proper divisors (1302363).

40372261 is a wasteful number, since it uses less digits than its factorization.

40372261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302362.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 40372261 is about 6353.9169808867. The cubic root of 40372261 is about 343.0528439862.

Adding to 40372261 its reverse (16227304), we get a palindrome (56599565).

The spelling of 40372261 in words is "forty million, three hundred seventy-two thousand, two hundred sixty-one".