1265260131 has 12 divisors (see below), whose sum is σ = 1829552400. Its totient is φ = 842604720.

The previous prime is 1265260121. The next prime is 1265260159. The reversal of 1265260131 is 1310625621.

1265260131 is a `hidden beast` number, since 1 + 2 + 6 + 52 + 601 + 3 + 1 = 666.

It is not a de Polignac number, because 1265260131 - 2⁵ = 1265260099 is a prime.

It is a super-2 number, since 2×1265260131² = 3201766398196274322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1265260095 and 1265260104.

It is not an unprimeable number, because it can be changed into a prime (1265260121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66231 + ... + 83168.

It is an arithmetic number, because the mean of its divisors is an integer number (152462700).

Almost surely, 2^1265260131 is an apocalyptic number.

1265260131 is a deficient number, since it is larger than the sum of its proper divisors (564292269).

1265260131 is a wasteful number, since it uses less digits than its factorization.

1265260131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150346 (or 150343 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1265260131 is about 35570.4952313009. The cubic root of 1265260131 is about 1081.5832206469.

Adding to 1265260131 its reverse (1310625621), we get a palindrome (2575885752).

The spelling of 1265260131 in words is "one billion, two hundred sixty-five million, two hundred sixty thousand, one hundred thirty-one".