1253261551 has 2 divisors, whose sum is σ = 1253261552. Its totient is φ = 1253261550.

The previous prime is 1253261453. The next prime is 1253261567. The reversal of 1253261551 is 1551623521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1253261551 - 2¹⁷ = 1253130479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1253261351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626630775 + 626630776.

It is an arithmetic number, because the mean of its divisors is an integer number (626630776).

Almost surely, 2^1253261551 is an apocalyptic number.

1253261551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253261551 is an equidigital number, since it uses as much as digits as its factorization.

1253261551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9000, while the sum is 31.

The square root of 1253261551 is about 35401.4343071012. The cubic root of 1253261551 is about 1078.1534378059.

The spelling of 1253261551 in words is "one billion, two hundred fifty-three million, two hundred sixty-one thousand, five hundred fifty-one".