42451207 has 2 divisors, whose sum is σ = 42451208. Its totient is φ = 42451206.

The previous prime is 42451153. The next prime is 42451219. The reversal of 42451207 is 70215424.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42451207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42451237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21225603 + 21225604.

It is an arithmetic number, because the mean of its divisors is an integer number (21225604).

Almost surely, 2^42451207 is an apocalyptic number.

42451207 is a deficient number, since it is larger than the sum of its proper divisors (1).

42451207 is an equidigital number, since it uses as much as digits as its factorization.

42451207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 42451207 is about 6515.4590782231. The cubic root of 42451207 is about 348.8430012802.

The spelling of 42451207 in words is "forty-two million, four hundred fifty-one thousand, two hundred seven".