145274491 has 2 divisors, whose sum is σ = 145274492. Its totient is φ = 145274490.

The previous prime is 145274483. The next prime is 145274497. The reversal of 145274491 is 194472541.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145274491 - 2³ = 145274483 is a prime.

It is a super-2 number, since 2×145274491² = 42209355470618162, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 145274491.

It is not a weakly prime, because it can be changed into another prime (145274497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72637245 + 72637246.

It is an arithmetic number, because the mean of its divisors is an integer number (72637246).

Almost surely, 2^145274491 is an apocalyptic number.

145274491 is a deficient number, since it is larger than the sum of its proper divisors (1).

145274491 is an equidigital number, since it uses as much as digits as its factorization.

145274491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 37.

The square root of 145274491 is about 12052.9868082563. The cubic root of 145274491 is about 525.6900869236.

The spelling of 145274491 in words is "one hundred forty-five million, two hundred seventy-four thousand, four hundred ninety-one".