145031501 has 2 divisors, whose sum is σ = 145031502. Its totient is φ = 145031500.

The previous prime is 145031489. The next prime is 145031507. The reversal of 145031501 is 105130541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130553476 + 14478025 = 11426^2 + 3805^2 .

It is an emirp because it is prime and its reverse (105130541) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145031501 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145031507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72515750 + 72515751.

It is an arithmetic number, because the mean of its divisors is an integer number (72515751).

Almost surely, 2^145031501 is an apocalyptic number.

It is an amenable number.

145031501 is a deficient number, since it is larger than the sum of its proper divisors (1).

145031501 is an equidigital number, since it uses as much as digits as its factorization.

145031501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 145031501 is about 12042.9025155898. The cubic root of 145031501 is about 525.3968289248.

The spelling of 145031501 in words is "one hundred forty-five million, thirty-one thousand, five hundred one".