1263072427 has 4 divisors (see below), whose sum is σ = 1263152880. Its totient is φ = 1262991976.

The previous prime is 1263072403. The next prime is 1263072431. The reversal of 1263072427 is 7242703621.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7242703621 = 197 ⋅36764993.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1263072427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1263072392 and 1263072401.

It is not an unprimeable number, because it can be changed into a prime (1263072227) 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, 8152 + ... + 50917.

It is an arithmetic number, because the mean of its divisors is an integer number (315788220).

Almost surely, 2^1263072427 is an apocalyptic number.

1263072427 is a deficient number, since it is larger than the sum of its proper divisors (80453).

1263072427 is an equidigital number, since it uses as much as digits as its factorization.

1263072427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80452.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 1263072427 is about 35539.7302606534. The cubic root of 1263072427 is about 1080.9594888294.

The spelling of 1263072427 in words is "one billion, two hundred sixty-three million, seventy-two thousand, four hundred twenty-seven".