40242451 has 4 divisors (see below), whose sum is σ = 42609672. Its totient is φ = 37875232.

The previous prime is 40242427. The next prime is 40242457. The reversal of 40242451 is 15424204.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40242451 - 2¹⁵ = 40209683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40242457) 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 3 ways as a sum of consecutive naturals, for example, 1183585 + ... + 1183618.

It is an arithmetic number, because the mean of its divisors is an integer number (10652418).

Almost surely, 2^40242451 is an apocalyptic number.

40242451 is a deficient number, since it is larger than the sum of its proper divisors (2367221).

40242451 is a wasteful number, since it uses less digits than its factorization.

40242451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2367220.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 40242451 is about 6343.6937977806. The cubic root of 40242451 is about 342.6847735835.

Adding to 40242451 its reverse (15424204), we get a palindrome (55666655).

The spelling of 40242451 in words is "forty million, two hundred forty-two thousand, four hundred fifty-one".