145717427 has 2 divisors, whose sum is σ = 145717428. Its totient is φ = 145717426.

The previous prime is 145717423. The next prime is 145717459. The reversal of 145717427 is 724717541.

It is a weak prime.

It is an emirp because it is prime and its reverse (724717541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145717427 - 2² = 145717423 is a prime.

It is not a weakly prime, because it can be changed into another prime (145717423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72858713 + 72858714.

It is an arithmetic number, because the mean of its divisors is an integer number (72858714).

Almost surely, 2^145717427 is an apocalyptic number.

145717427 is a deficient number, since it is larger than the sum of its proper divisors (1).

145717427 is an equidigital number, since it uses as much as digits as its factorization.

145717427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54880, while the sum is 38.

The square root of 145717427 is about 12071.3473564470. The cubic root of 145717427 is about 526.2238140671.

The spelling of 145717427 in words is "one hundred forty-five million, seven hundred seventeen thousand, four hundred twenty-seven".