1271215125 has 36 divisors (see below), whose sum is σ = 2293734924. Its totient is φ = 677343600.

The previous prime is 1271215117. The next prime is 1271215133. The reversal of 1271215125 is 5215121721.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

1271215125 is a `hidden beast` number, since 1 + 27 + 121 + 512 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (1271215117) and next prime (1271215133).

It can be written as a sum of positive squares in 2 ways, for example, as 40678884 + 1230536241 = 6378^2 + 35079^2 .

It is not a de Polignac number, because 1271215125 - 2³ = 1271215117 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1195344 + ... + 1196406.

It is an arithmetic number, because the mean of its divisors is an integer number (63714859).

Almost surely, 2^1271215125 is an apocalyptic number.

1271215125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1271215125 is a deficient number, since it is larger than the sum of its proper divisors (1022519799).

1271215125 is an frugal number, since it uses more digits than its factorization.

1271215125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147 (or 1071 counting only the distinct ones).

The product of its digits is 1400, while the sum is 27.

The square root of 1271215125 is about 35654.1039012341. The cubic root of 1271215125 is about 1083.2774027666.

Adding to 1271215125 its reverse (5215121721), we get a palindrome (6486336846).

The spelling of 1271215125 in words is "one billion, two hundred seventy-one million, two hundred fifteen thousand, one hundred twenty-five".