145247701 has 2 divisors, whose sum is σ = 145247702. Its totient is φ = 145247700.

The previous prime is 145247699. The next prime is 145247777. The reversal of 145247701 is 107742541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128845201 + 16402500 = 11351^2 + 4050^2 .

It is an emirp because it is prime and its reverse (107742541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145247701 - 2¹ = 145247699 is a prime.

Together with 145247699, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145217701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72623850 + 72623851.

It is an arithmetic number, because the mean of its divisors is an integer number (72623851).

Almost surely, 2^145247701 is an apocalyptic number.

It is an amenable number.

145247701 is a deficient number, since it is larger than the sum of its proper divisors (1).

145247701 is an equidigital number, since it uses as much as digits as its factorization.

145247701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 145247701 is about 12051.8754142250. The cubic root of 145247701 is about 525.6577708505.

The spelling of 145247701 in words is "one hundred forty-five million, two hundred forty-seven thousand, seven hundred one".