145304681 has 2 divisors, whose sum is σ = 145304682. Its totient is φ = 145304680.

The previous prime is 145304629. The next prime is 145304689. The reversal of 145304681 is 186403541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79370281 + 65934400 = 8909^2 + 8120^2 .

It is an emirp because it is prime and its reverse (186403541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145304681 - 2⁶ = 145304617 is a prime.

It is a super-2 number, since 2×145304681² = 42226900641023522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145304689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72652340 + 72652341.

It is an arithmetic number, because the mean of its divisors is an integer number (72652341).

Almost surely, 2^145304681 is an apocalyptic number.

It is an amenable number.

145304681 is a deficient number, since it is larger than the sum of its proper divisors (1).

145304681 is an equidigital number, since it uses as much as digits as its factorization.

145304681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 145304681 is about 12054.2391298663. The cubic root of 145304681 is about 525.7264995664.

The spelling of 145304681 in words is "one hundred forty-five million, three hundred four thousand, six hundred eighty-one".