145251947 has 2 divisors, whose sum is σ = 145251948. Its totient is φ = 145251946.

The previous prime is 145251929. The next prime is 145252001. The reversal of 145251947 is 749152541.

145251947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145251947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145251947.

It is not a weakly prime, because it can be changed into another prime (145251907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72625973 + 72625974.

It is an arithmetic number, because the mean of its divisors is an integer number (72625974).

Almost surely, 2^145251947 is an apocalyptic number.

145251947 is a deficient number, since it is larger than the sum of its proper divisors (1).

145251947 is an equidigital number, since it uses as much as digits as its factorization.

145251947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 38.

The square root of 145251947 is about 12052.0515680941. The cubic root of 145251947 is about 525.6628929537.

The spelling of 145251947 in words is "one hundred forty-five million, two hundred fifty-one thousand, nine hundred forty-seven".