145995901 has 2 divisors, whose sum is σ = 145995902. Its totient is φ = 145995900.

The previous prime is 145995893. The next prime is 145995917. The reversal of 145995901 is 109599541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130988025 + 15007876 = 11445^2 + 3874^2 .

It is an emirp because it is prime and its reverse (109599541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145995901 - 2³ = 145995893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145995931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72997950 + 72997951.

It is an arithmetic number, because the mean of its divisors is an integer number (72997951).

Almost surely, 2^145995901 is an apocalyptic number.

It is an amenable number.

145995901 is a deficient number, since it is larger than the sum of its proper divisors (1).

145995901 is an equidigital number, since it uses as much as digits as its factorization.

145995901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72900, while the sum is 43.

The square root of 145995901 is about 12082.8763545772. The cubic root of 145995901 is about 526.5588149519.

The spelling of 145995901 in words is "one hundred forty-five million, nine hundred ninety-five thousand, nine hundred one".