40212407 has 2 divisors, whose sum is σ = 40212408. Its totient is φ = 40212406.

The previous prime is 40212397. The next prime is 40212413. The reversal of 40212407 is 70421204.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40212407 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40212427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20106203 + 20106204.

It is an arithmetic number, because the mean of its divisors is an integer number (20106204).

Almost surely, 2^40212407 is an apocalyptic number.

40212407 is a deficient number, since it is larger than the sum of its proper divisors (1).

40212407 is an equidigital number, since it uses as much as digits as its factorization.

40212407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 40212407 is about 6341.3253346599. The cubic root of 40212407 is about 342.5994724127.

The spelling of 40212407 in words is "forty million, two hundred twelve thousand, four hundred seven".