1263011421 has 8 divisors (see below), whose sum is σ = 1924588864. Its totient is φ = 721720800.

The previous prime is 1263011419. The next prime is 1263011423. The reversal of 1263011421 is 1241103621.

It is an interprime number because it is at equal distance from previous prime (1263011419) and next prime (1263011423).

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

It is not a de Polignac number, because 1263011421 - 2¹ = 1263011419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 60143401 = 1263011421 / (1 + 2 + 6 + 3 + 0 + 1 + 1 + 4 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263011423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30071680 + ... + 30071721.

It is an arithmetic number, because the mean of its divisors is an integer number (240573608).

Almost surely, 2^1263011421 is an apocalyptic number.

It is an amenable number.

1263011421 is a deficient number, since it is larger than the sum of its proper divisors (661577443).

1263011421 is an equidigital number, since it uses as much as digits as its factorization.

1263011421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60143411.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1263011421 is about 35538.8719714062. The cubic root of 1263011421 is about 1080.9420852150.

The spelling of 1263011421 in words is "one billion, two hundred sixty-three million, eleven thousand, four hundred twenty-one".