1282267257 has 4 divisors (see below), whose sum is σ = 1709689680. Its totient is φ = 854844836.

The previous prime is 1282267253. The next prime is 1282267271. The reversal of 1282267257 is 7527622821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1282267257 - 2² = 1282267253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1282267253) 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 in 3 ways as a sum of consecutive naturals, for example, 213711207 + ... + 213711212.

It is an arithmetic number, because the mean of its divisors is an integer number (427422420).

Almost surely, 2^1282267257 is an apocalyptic number.

It is an amenable number.

1282267257 is a deficient number, since it is larger than the sum of its proper divisors (427422423).

1282267257 is an equidigital number, since it uses as much as digits as its factorization.

1282267257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427422422.

The product of its digits is 188160, while the sum is 42.

The square root of 1282267257 is about 35808.7595009936. The cubic root of 1282267257 is about 1086.4077395787.

It can be divided in two parts, 128 and 2267257, that added together give a triangular number (2267385 = T₂₁₂₉).

The spelling of 1282267257 in words is "one billion, two hundred eighty-two million, two hundred sixty-seven thousand, two hundred fifty-seven".