42712249 has 2 divisors, whose sum is σ = 42712250. Its totient is φ = 42712248.

The previous prime is 42712231. The next prime is 42712289. The reversal of 42712249 is 94221724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37454400 + 5257849 = 6120^2 + 2293^2 .

It is a cyclic number.

It is not a de Polignac number, because 42712249 - 2⁵ = 42712217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42712249.

It is not a weakly prime, because it can be changed into another prime (42712289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21356124 + 21356125.

It is an arithmetic number, because the mean of its divisors is an integer number (21356125).

Almost surely, 2^42712249 is an apocalyptic number.

It is an amenable number.

42712249 is a deficient number, since it is larger than the sum of its proper divisors (1).

42712249 is an equidigital number, since it uses as much as digits as its factorization.

42712249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 31.

The square root of 42712249 is about 6535.4608865787. The cubic root of 42712249 is about 349.5565785946.

The spelling of 42712249 in words is "forty-two million, seven hundred twelve thousand, two hundred forty-nine".