145215001 has 2 divisors, whose sum is σ = 145215002. Its totient is φ = 145215000.

The previous prime is 145214963. The next prime is 145215019. The reversal of 145215001 is 100512541.

145215001 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 can be written as a sum of positive squares in only one way, i.e., 130507776 + 14707225 = 11424^2 + 3835^2 .

It is an emirp because it is prime and its reverse (100512541) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145215001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145215001.

It is not a weakly prime, because it can be changed into another prime (145215401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72607500 + 72607501.

It is an arithmetic number, because the mean of its divisors is an integer number (72607501).

Almost surely, 2^145215001 is an apocalyptic number.

It is an amenable number.

145215001 is a deficient number, since it is larger than the sum of its proper divisors (1).

145215001 is an equidigital number, since it uses as much as digits as its factorization.

145215001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 145215001 is about 12050.5187025289. The cubic root of 145215001 is about 525.6183203139.

Adding to 145215001 its reverse (100512541), we get a palindrome (245727542).

The spelling of 145215001 in words is "one hundred forty-five million, two hundred fifteen thousand, one".