1261051325 has 48 divisors (see below), whose sum is σ = 1676083200. Its totient is φ = 939556800.

The previous prime is 1261051307. The next prime is 1261051349. The reversal of 1261051325 is 5231501621.

It is not a de Polignac number, because 1261051325 - 2⁸ = 1261051069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1261051294 and 1261051303.

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 47 ways as a sum of consecutive naturals, for example, 2632436 + ... + 2632914.

It is an arithmetic number, because the mean of its divisors is an integer number (34918400).

Almost surely, 2^1261051325 is an apocalyptic number.

It is an amenable number.

1261051325 is a deficient number, since it is larger than the sum of its proper divisors (415031875).

1261051325 is a wasteful number, since it uses less digits than its factorization.

1261051325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642 (or 637 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 1261051325 is about 35511.2844740936. The cubic root of 1261051325 is about 1080.3826162048.

Adding to 1261051325 its reverse (5231501621), we get a palindrome (6492552946).

The spelling of 1261051325 in words is "one billion, two hundred sixty-one million, fifty-one thousand, three hundred twenty-five".