1263864741 has 4 divisors (see below), whose sum is σ = 1685152992. Its totient is φ = 842576492.

The previous prime is 1263864737. The next prime is 1263864793. The reversal of 1263864741 is 1474683621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1263864741 - 2² = 1263864737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1263864693 and 1263864702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263864731) 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, 210644121 + ... + 210644126.

It is an arithmetic number, because the mean of its divisors is an integer number (421288248).

Almost surely, 2^1263864741 is an apocalyptic number.

It is an amenable number.

1263864741 is a deficient number, since it is larger than the sum of its proper divisors (421288251).

1263864741 is an equidigital number, since it uses as much as digits as its factorization.

1263864741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421288250.

The product of its digits is 193536, while the sum is 42.

The square root of 1263864741 is about 35550.8753900660. The cubic root of 1263864741 is about 1081.1854669806.

The spelling of 1263864741 in words is "one billion, two hundred sixty-three million, eight hundred sixty-four thousand, seven hundred forty-one".