1255515461 has 2 divisors, whose sum is σ = 1255515462. Its totient is φ = 1255515460.

The previous prime is 1255515451. The next prime is 1255515493. The reversal of 1255515461 is 1645155521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1149549025 + 105966436 = 33905^2 + 10294^2 .

It is a cyclic number.

It is not a de Polignac number, because 1255515461 - 2¹⁸ = 1255253317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1255515451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627757730 + 627757731.

It is an arithmetic number, because the mean of its divisors is an integer number (627757731).

Almost surely, 2^1255515461 is an apocalyptic number.

It is an amenable number.

1255515461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255515461 is an equidigital number, since it uses as much as digits as its factorization.

1255515461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30000, while the sum is 35.

The square root of 1255515461 is about 35433.2536044885. The cubic root of 1255515461 is about 1078.7993805191.

The spelling of 1255515461 in words is "one billion, two hundred fifty-five million, five hundred fifteen thousand, four hundred sixty-one".