145644461 has 2 divisors, whose sum is σ = 145644462. Its totient is φ = 145644460.

The previous prime is 145644451. The next prime is 145644497. The reversal of 145644461 is 164446541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144456361 + 1188100 = 12019^2 + 1090^2 .

It is a cyclic number.

It is not a de Polignac number, because 145644461 - 2²² = 141450157 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145644451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72822230 + 72822231.

It is an arithmetic number, because the mean of its divisors is an integer number (72822231).

Almost surely, 2^145644461 is an apocalyptic number.

It is an amenable number.

145644461 is a deficient number, since it is larger than the sum of its proper divisors (1).

145644461 is an equidigital number, since it uses as much as digits as its factorization.

145644461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46080, while the sum is 35.

The square root of 145644461 is about 12068.3246973223. The cubic root of 145644461 is about 526.1359662870.

The spelling of 145644461 in words is "one hundred forty-five million, six hundred forty-four thousand, four hundred sixty-one".