40296421 has 4 divisors (see below), whose sum is σ = 43959744. Its totient is φ = 36633100.

The previous prime is 40296401. The next prime is 40296463. The reversal of 40296421 is 12469204.

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 a de Polignac number, because none of the positive numbers 2^k-40296421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40296421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40296401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1831645 + ... + 1831666.

It is an arithmetic number, because the mean of its divisors is an integer number (10989936).

Almost surely, 2^40296421 is an apocalyptic number.

It is an amenable number.

40296421 is a deficient number, since it is larger than the sum of its proper divisors (3663323).

40296421 is a wasteful number, since it uses less digits than its factorization.

40296421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3663322.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 40296421 is about 6347.9462033007. The cubic root of 40296421 is about 342.8378990770.

The spelling of 40296421 in words is "forty million, two hundred ninety-six thousand, four hundred twenty-one".