40247425 has 6 divisors (see below), whose sum is σ = 49906838. Its totient is φ = 32197920.

The previous prime is 40247423. The next prime is 40247429. The reversal of 40247425 is 52474204.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1089 + 40246336 = 33^2 + 6344^2 .

It is not a de Polignac number, because 40247425 - 2¹ = 40247423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40247393 and 40247402.

It is not an unprimeable number, because it can be changed into a prime (40247423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 804924 + ... + 804973.

Almost surely, 2^40247425 is an apocalyptic number.

It is an amenable number.

40247425 is a deficient number, since it is larger than the sum of its proper divisors (9659413).

40247425 is a wasteful number, since it uses less digits than its factorization.

40247425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1609907 (or 1609902 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 28.

The square root of 40247425 is about 6344.0858285493. The cubic root of 40247425 is about 342.6988917083.

It can be divided in two parts, 4024 and 7425, that added together give a square (11449 = 107²).

The spelling of 40247425 in words is "forty million, two hundred forty-seven thousand, four hundred twenty-five".