145098521 has 2 divisors, whose sum is σ = 145098522. Its totient is φ = 145098520.

The previous prime is 145098509. The next prime is 145098529. The reversal of 145098521 is 125890541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132595225 + 12503296 = 11515^2 + 3536^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145098521 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (145098529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72549260 + 72549261.

It is an arithmetic number, because the mean of its divisors is an integer number (72549261).

Almost surely, 2^145098521 is an apocalyptic number.

It is an amenable number.

145098521 is a deficient number, since it is larger than the sum of its proper divisors (1).

145098521 is an equidigital number, since it uses as much as digits as its factorization.

145098521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 35.

The square root of 145098521 is about 12045.6847459993. The cubic root of 145098521 is about 525.4777462260.

The spelling of 145098521 in words is "one hundred forty-five million, ninety-eight thousand, five hundred twenty-one".