1263011420 has 48 divisors (see below), whose sum is σ = 3019258368. Its totient is φ = 439306560.

The previous prime is 1263011419. The next prime is 1263011423. The reversal of 1263011420 is 241103621.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1263011392 and 1263011401.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119744 + ... + 129863.

It is an arithmetic number, because the mean of its divisors is an integer number (62901216).

Almost surely, 2^1263011420 is an apocalyptic number.

1263011420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1263011420 is an abundant number, since it is smaller than the sum of its proper divisors (1756246948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1263011420 is a wasteful number, since it uses less digits than its factorization.

1263011420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249650 (or 249648 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1263011420 is about 35538.8719573371. The cubic root of 1263011420 is about 1080.9420849297.

It can be divided in two parts, 126301 and 1420, that added together give a palindrome (127721).

The spelling of 1263011420 in words is "one billion, two hundred sixty-three million, eleven thousand, four hundred twenty".