42931253 has 2 divisors, whose sum is σ = 42931254. Its totient is φ = 42931252.

The previous prime is 42931201. The next prime is 42931267. The reversal of 42931253 is 35213924.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42081169 + 850084 = 6487^2 + 922^2 .

It is a cyclic number.

It is not a de Polignac number, because 42931253 - 2¹⁶ = 42865717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42931453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21465626 + 21465627.

It is an arithmetic number, because the mean of its divisors is an integer number (21465627).

Almost surely, 2^42931253 is an apocalyptic number.

It is an amenable number.

42931253 is a deficient number, since it is larger than the sum of its proper divisors (1).

42931253 is an equidigital number, since it uses as much as digits as its factorization.

42931253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 29.

The square root of 42931253 is about 6552.1945178696. The cubic root of 42931253 is about 350.1530024930.

The spelling of 42931253 in words is "forty-two million, nine hundred thirty-one thousand, two hundred fifty-three".