40421297 has 4 divisors (see below), whose sum is σ = 46195776. Its totient is φ = 34646820.

The previous prime is 40421287. The next prime is 40421299. The reversal of 40421297 is 79212404.

40421297 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 40421297 - 2¹⁸ = 40159153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40421299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2887229 + ... + 2887242.

It is an arithmetic number, because the mean of its divisors is an integer number (11548944).

Almost surely, 2^40421297 is an apocalyptic number.

It is an amenable number.

40421297 is a deficient number, since it is larger than the sum of its proper divisors (5774479).

40421297 is an equidigital number, since it uses as much as digits as its factorization.

40421297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5774478.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 40421297 is about 6357.7745320198. The cubic root of 40421297 is about 343.1916780339.

The spelling of 40421297 in words is "forty million, four hundred twenty-one thousand, two hundred ninety-seven".