1267801253 has 2 divisors, whose sum is σ = 1267801254. Its totient is φ = 1267801252.

The previous prime is 1267801237. The next prime is 1267801279. The reversal of 1267801253 is 3521087621.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1226610529 + 41190724 = 35023^2 + 6418^2 .

It is a cyclic number.

It is not a de Polignac number, because 1267801253 - 2⁴ = 1267801237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1267801553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633900626 + 633900627.

It is an arithmetic number, because the mean of its divisors is an integer number (633900627).

Almost surely, 2^1267801253 is an apocalyptic number.

It is an amenable number.

1267801253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1267801253 is an equidigital number, since it uses as much as digits as its factorization.

1267801253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 1267801253 is about 35606.1968342591. The cubic root of 1267801253 is about 1082.3068128246.

Adding to 1267801253 its reverse (3521087621), we get a palindrome (4788888874).

The spelling of 1267801253 in words is "one billion, two hundred sixty-seven million, eight hundred one thousand, two hundred fifty-three".