40002451 has 6 divisors (see below), whose sum is σ = 41817860. Its totient is φ = 38262708.

The previous prime is 40002437. The next prime is 40002463. The reversal of 40002451 is 15420004.

It is not a de Polignac number, because 40002451 - 2⁹ = 40001939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40002421) 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, 37281 + ... + 38338.

Almost surely, 2^40002451 is an apocalyptic number.

40002451 is a deficient number, since it is larger than the sum of its proper divisors (1815409).

40002451 is an equidigital number, since it uses as much as digits as its factorization.

40002451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75665 (or 75642 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 40002451 is about 6324.7490859322. The cubic root of 40002451 is about 342.0021744444.

Adding to 40002451 its reverse (15420004), we get a palindrome (55422455).

The spelling of 40002451 in words is "forty million, two thousand, four hundred fifty-one".