145274861 has 2 divisors, whose sum is σ = 145274862. Its totient is φ = 145274860.

The previous prime is 145274819. The next prime is 145274867. The reversal of 145274861 is 168472541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145202500 + 72361 = 12050^2 + 269^2 .

It is an emirp because it is prime and its reverse (168472541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145274861 - 2⁶ = 145274797 is a prime.

It is a super-2 number, since 2×145274861² = 42209570477138642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145274867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72637430 + 72637431.

It is an arithmetic number, because the mean of its divisors is an integer number (72637431).

Almost surely, 2^145274861 is an apocalyptic number.

It is an amenable number.

145274861 is a deficient number, since it is larger than the sum of its proper divisors (1).

145274861 is an equidigital number, since it uses as much as digits as its factorization.

145274861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 38.

The square root of 145274861 is about 12053.0021571391. The cubic root of 145274861 is about 525.6905332170.

The spelling of 145274861 in words is "one hundred forty-five million, two hundred seventy-four thousand, eight hundred sixty-one".