145252001 has 2 divisors, whose sum is σ = 145252002. Its totient is φ = 145252000.

The previous prime is 145251947. The next prime is 145252033. The reversal of 145252001 is 100252541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135955600 + 9296401 = 11660^2 + 3049^2 .

It is an emirp because it is prime and its reverse (100252541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145252001 - 2²⁶ = 78143137 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (145252801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72626000 + 72626001.

It is an arithmetic number, because the mean of its divisors is an integer number (72626001).

Almost surely, 2^145252001 is an apocalyptic number.

It is an amenable number.

145252001 is a deficient number, since it is larger than the sum of its proper divisors (1).

145252001 is an equidigital number, since it uses as much as digits as its factorization.

145252001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 145252001 is about 12052.0538083764. The cubic root of 145252001 is about 525.6629580952.

The spelling of 145252001 in words is "one hundred forty-five million, two hundred fifty-two thousand, one".