1255515451 has 2 divisors, whose sum is σ = 1255515452. Its totient is φ = 1255515450.

The previous prime is 1255515439. The next prime is 1255515461. The reversal of 1255515451 is 1545155521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1255515451 - 2⁷ = 1255515323 is a prime.

It is not a weakly prime, because it can be changed into another prime (1255515461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627757725 + 627757726.

It is an arithmetic number, because the mean of its divisors is an integer number (627757726).

Almost surely, 2^1255515451 is an apocalyptic number.

1255515451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255515451 is an equidigital number, since it uses as much as digits as its factorization.

1255515451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25000, while the sum is 34.

The square root of 1255515451 is about 35433.2534633782. The cubic root of 1255515451 is about 1078.7993776549.

The spelling of 1255515451 in words is "one billion, two hundred fifty-five million, five hundred fifteen thousand, four hundred fifty-one".