1261314523 has 4 divisors (see below), whose sum is σ = 1441502320. Its totient is φ = 1081126728.

The previous prime is 1261314521. The next prime is 1261314539. The reversal of 1261314523 is 3254131621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1261314523 - 2¹ = 1261314521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1261314491 and 1261314500.

It is not an unprimeable number, because it can be changed into a prime (1261314521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90093888 + ... + 90093901.

It is an arithmetic number, because the mean of its divisors is an integer number (360375580).

Almost surely, 2^1261314523 is an apocalyptic number.

1261314523 is a deficient number, since it is larger than the sum of its proper divisors (180187797).

1261314523 is an equidigital number, since it uses as much as digits as its factorization.

1261314523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180187796.

The product of its digits is 4320, while the sum is 28.

The square root of 1261314523 is about 35514.9901168507. The cubic root of 1261314523 is about 1080.4577743308.

The spelling of 1261314523 in words is "one billion, two hundred sixty-one million, three hundred fourteen thousand, five hundred twenty-three".