40421299 has 2 divisors, whose sum is σ = 40421300. Its totient is φ = 40421298.

The previous prime is 40421287. The next prime is 40421309. The reversal of 40421299 is 99212404.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40421299 - 2⁵ = 40421267 is a prime.

It is equal to p_2457751 and since 40421299 and 2457751 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40421299.

It is not a weakly prime, because it can be changed into another prime (40421239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20210649 + 20210650.

It is an arithmetic number, because the mean of its divisors is an integer number (20210650).

Almost surely, 2^40421299 is an apocalyptic number.

40421299 is a deficient number, since it is larger than the sum of its proper divisors (1).

40421299 is an equidigital number, since it uses as much as digits as its factorization.

40421299 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 40421299 is about 6357.7746893076. The cubic root of 40421299 is about 343.1916836941.

The spelling of 40421299 in words is "forty million, four hundred twenty-one thousand, two hundred ninety-nine".