42451393 has 2 divisors, whose sum is σ = 42451394. Its totient is φ = 42451392.

The previous prime is 42451373. The next prime is 42451417. The reversal of 42451393 is 39315424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36385024 + 6066369 = 6032^2 + 2463^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42451393 is a prime.

It is not a weakly prime, because it can be changed into another prime (42451373) 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, 21225696 + 21225697.

It is an arithmetic number, because the mean of its divisors is an integer number (21225697).

Almost surely, 2^42451393 is an apocalyptic number.

It is an amenable number.

42451393 is a deficient number, since it is larger than the sum of its proper divisors (1).

42451393 is an equidigital number, since it uses as much as digits as its factorization.

42451393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 31.

The square root of 42451393 is about 6515.4733519523. The cubic root of 42451393 is about 348.8435107648.

The spelling of 42451393 in words is "forty-two million, four hundred fifty-one thousand, three hundred ninety-three".