1263581725 has 24 divisors (see below), whose sum is σ = 1807437888. Its totient is φ = 858345600.

The previous prime is 1263581723. The next prime is 1263581771. The reversal of 1263581725 is 5271853621.

It is not a de Polignac number, because 1263581725 - 2¹ = 1263581723 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263581723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15016 + ... + 52465.

It is an arithmetic number, because the mean of its divisors is an integer number (75309912).

Almost surely, 2^1263581725 is an apocalyptic number.

It is an amenable number.

1263581725 is a deficient number, since it is larger than the sum of its proper divisors (543856163).

1263581725 is a wasteful number, since it uses less digits than its factorization.

1263581725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67605 (or 67600 counting only the distinct ones).

The product of its digits is 100800, while the sum is 40.

The square root of 1263581725 is about 35546.8947307638. The cubic root of 1263581725 is about 1081.1047580199.

The spelling of 1263581725 in words is "one billion, two hundred sixty-three million, five hundred eighty-one thousand, seven hundred twenty-five".