1278482251 has 2 divisors, whose sum is σ = 1278482252. Its totient is φ = 1278482250.

The previous prime is 1278482237. The next prime is 1278482299. The reversal of 1278482251 is 1522848721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1278482251 - 2¹⁵ = 1278449483 is a prime.

It is a super-2 number, since 2×1278482251² = 3269033732244054002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1278480251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639241125 + 639241126.

It is an arithmetic number, because the mean of its divisors is an integer number (639241126).

Almost surely, 2^1278482251 is an apocalyptic number.

1278482251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1278482251 is an equidigital number, since it uses as much as digits as its factorization.

1278482251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71680, while the sum is 40.

The square root of 1278482251 is about 35755.8701614155. The cubic root of 1278482251 is about 1085.3377305924.

The spelling of 1278482251 in words is "one billion, two hundred seventy-eight million, four hundred eighty-two thousand, two hundred fifty-one".