1261523485 has 16 divisors (see below), whose sum is σ = 1526169600. Its totient is φ = 1001023360.

The previous prime is 1261523413. The next prime is 1261523491. The reversal of 1261523485 is 5843251621.

1261523485 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1261523485 - 2¹⁷ = 1261392413 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 364041 + ... + 367489.

It is an arithmetic number, because the mean of its divisors is an integer number (95385600).

Almost surely, 2^1261523485 is an apocalyptic number.

It is an amenable number.

1261523485 is a deficient number, since it is larger than the sum of its proper divisors (264646115).

1261523485 is a wasteful number, since it uses less digits than its factorization.

1261523485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4028.

The product of its digits is 57600, while the sum is 37.

The square root of 1261523485 is about 35517.9318795450. The cubic root of 1261523485 is about 1080.5174375225.

It can be divided in two parts, 12615 and 23485, that added together give a square (36100 = 190²).

The spelling of 1261523485 in words is "one billion, two hundred sixty-one million, five hundred twenty-three thousand, four hundred eighty-five".