1451565161 has 2 divisors, whose sum is σ = 1451565162. Its totient is φ = 1451565160.

The previous prime is 1451565151. The next prime is 1451565191. The reversal of 1451565161 is 1615651541.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 814759936 + 636805225 = 28544^2 + 25235^2 .

It is a cyclic number.

It is not a de Polignac number, because 1451565161 - 2¹⁸ = 1451303017 is a prime.

It is not a weakly prime, because it can be changed into another prime (1451565151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 725782580 + 725782581.

It is an arithmetic number, because the mean of its divisors is an integer number (725782581).

Almost surely, 2^1451565161 is an apocalyptic number.

It is an amenable number.

1451565161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1451565161 is an equidigital number, since it uses as much as digits as its factorization.

1451565161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18000, while the sum is 35.

The square root of 1451565161 is about 38099.4115571356. The cubic root of 1451565161 is about 1132.2582976464.

The spelling of 1451565161 in words is "one billion, four hundred fifty-one million, five hundred sixty-five thousand, one hundred sixty-one".