40251225 has 48 divisors (see below), whose sum is σ = 77868032. Its totient is φ = 17962560.

The previous prime is 40251209. The next prime is 40251241. The reversal of 40251225 is 52215204.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (40251209) and next prime (40251241).

It is not a de Polignac number, because 40251225 - 2⁴ = 40251209 is a prime.

It is a super-2 number, since 2×40251225² = 3240322228001250, which contains 22 as substring.

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

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21684 + ... + 23466.

Almost surely, 2^40251225 is an apocalyptic number.

It is an amenable number.

40251225 is a deficient number, since it is larger than the sum of its proper divisors (37616807).

40251225 is a wasteful number, since it uses less digits than its factorization.

40251225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1846 (or 1841 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 40251225 is about 6344.3853130150. The cubic root of 40251225 is about 342.7096767859.

Adding to 40251225 its reverse (52215204), we get a palindrome (92466429).

The spelling of 40251225 in words is "forty million, two hundred fifty-one thousand, two hundred twenty-five".