145902247 has 2 divisors, whose sum is σ = 145902248. Its totient is φ = 145902246.

The previous prime is 145902233. The next prime is 145902283. The reversal of 145902247 is 742209541.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145902247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145902217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72951123 + 72951124.

It is an arithmetic number, because the mean of its divisors is an integer number (72951124).

Almost surely, 2^145902247 is an apocalyptic number.

145902247 is a deficient number, since it is larger than the sum of its proper divisors (1).

145902247 is an equidigital number, since it uses as much as digits as its factorization.

145902247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 145902247 is about 12079.0002483649. Note that the first 3 decimals coincide. The cubic root of 145902247 is about 526.4461978910.

The spelling of 145902247 in words is "one hundred forty-five million, nine hundred two thousand, two hundred forty-seven".