1271267125 has 8 divisors (see below), whose sum is σ = 1586541528. Its totient is φ = 1017013600.

The previous prime is 1271267119. The next prime is 1271267149. The reversal of 1271267125 is 5217621721.

It can be written as a sum of positive squares in 4 ways, for example, as 368985681 + 902281444 = 19209^2 + 30038^2 .

It is not a de Polignac number, because 1271267125 - 2³ = 1271267117 is a prime.

It is a super-2 number, since 2×1271267125² = 3232240206211531250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5084944 + ... + 5085193.

It is an arithmetic number, because the mean of its divisors is an integer number (198317691).

Almost surely, 2^1271267125 is an apocalyptic number.

It is an amenable number.

1271267125 is a deficient number, since it is larger than the sum of its proper divisors (315274403).

1271267125 is an equidigital number, since it uses as much as digits as its factorization.

1271267125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10170152 (or 10170142 counting only the distinct ones).

The product of its digits is 11760, while the sum is 34.

The square root of 1271267125 is about 35654.8331225936. The cubic root of 1271267125 is about 1083.2921733211.

Adding to 1271267125 its reverse (5217621721), we get a palindrome (6488888846).

The spelling of 1271267125 in words is "one billion, two hundred seventy-one million, two hundred sixty-seven thousand, one hundred twenty-five".