40421347 has 2 divisors, whose sum is σ = 40421348. Its totient is φ = 40421346.

The previous prime is 40421323. The next prime is 40421357. The reversal of 40421347 is 74312404.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40421347 - 2¹¹ = 40419299 is a prime.

It is not a weakly prime, because it can be changed into another prime (40421317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20210673 + 20210674.

It is an arithmetic number, because the mean of its divisors is an integer number (20210674).

Almost surely, 2^40421347 is an apocalyptic number.

40421347 is a deficient number, since it is larger than the sum of its proper divisors (1).

40421347 is an equidigital number, since it uses as much as digits as its factorization.

40421347 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 40421347 is about 6357.7784642122. The cubic root of 40421347 is about 343.1918195399.

The spelling of 40421347 in words is "forty million, four hundred twenty-one thousand, three hundred forty-seven".