1261125336 has 16 divisors (see below), whose sum is σ = 3152813400. Its totient is φ = 420375104.

The previous prime is 1261125319. The next prime is 1261125373. The reversal of 1261125336 is 6335211621.

It is a super-2 number, since 2×1261125336² = 3180874226202225792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26273421 + ... + 26273468.

Almost surely, 2^1261125336 is an apocalyptic number.

It is an amenable number.

1261125336 is an abundant number, since it is smaller than the sum of its proper divisors (1891688064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1261125336 is a wasteful number, since it uses less digits than its factorization.

1261125336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52546898 (or 52546894 counting only the distinct ones).

The product of its digits is 6480, while the sum is 30.

The square root of 1261125336 is about 35512.3265360072. The cubic root of 1261125336 is about 1080.4037516473.

Adding to 1261125336 its reverse (6335211621), we get a palindrome (7596336957).

The spelling of 1261125336 in words is "one billion, two hundred sixty-one million, one hundred twenty-five thousand, three hundred thirty-six".