1263404311 has 8 divisors (see below), whose sum is σ = 1360907744. Its totient is φ = 1165946400.

The previous prime is 1263404293. The next prime is 1263404399. The reversal of 1263404311 is 1134043621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1263404311 - 2⁵ = 1263404279 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 (1263704311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65590 + ... + 82636.

It is an arithmetic number, because the mean of its divisors is an integer number (170113468).

Almost surely, 2^1263404311 is an apocalyptic number.

1263404311 is a deficient number, since it is larger than the sum of its proper divisors (97503433).

1263404311 is a wasteful number, since it uses less digits than its factorization.

1263404311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22761.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1263404311 is about 35544.3991509211. The cubic root of 1263404311 is about 1081.0541579167.

Adding to 1263404311 its reverse (1134043621), we get a palindrome (2397447932).

The spelling of 1263404311 in words is "one billion, two hundred sixty-three million, four hundred four thousand, three hundred eleven".