145203049 has 2 divisors, whose sum is σ = 145203050. Its totient is φ = 145203048.

The previous prime is 145203043. The next prime is 145203053. The reversal of 145203049 is 940302541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86955625 + 58247424 = 9325^2 + 7632^2 .

It is an emirp because it is prime and its reverse (940302541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145203049 - 2¹³ = 145194857 is a prime.

It is not a weakly prime, because it can be changed into another prime (145203043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72601524 + 72601525.

It is an arithmetic number, because the mean of its divisors is an integer number (72601525).

Almost surely, 2^145203049 is an apocalyptic number.

It is an amenable number.

145203049 is a deficient number, since it is larger than the sum of its proper divisors (1).

145203049 is an equidigital number, since it uses as much as digits as its factorization.

145203049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 145203049 is about 12050.0227800615. The cubic root of 145203049 is about 525.6038994839.

The spelling of 145203049 in words is "one hundred forty-five million, two hundred three thousand, forty-nine".