145474247 has 2 divisors, whose sum is σ = 145474248. Its totient is φ = 145474246.

The previous prime is 145474229. The next prime is 145474261. The reversal of 145474247 is 742474541.

It is a happy number.

145474247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145474247 - 2²⁶ = 78365383 is a prime.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 145474247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145473247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72737123 + 72737124.

It is an arithmetic number, because the mean of its divisors is an integer number (72737124).

Almost surely, 2^145474247 is an apocalyptic number.

145474247 is a deficient number, since it is larger than the sum of its proper divisors (1).

145474247 is an equidigital number, since it uses as much as digits as its factorization.

145474247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 125440, while the sum is 38.

The square root of 145474247 is about 12061.2705383803. The cubic root of 145474247 is about 525.9309221743.

The spelling of 145474247 in words is "one hundred forty-five million, four hundred seventy-four thousand, two hundred forty-seven".