1421263 has 4 divisors (see below), whose sum is σ = 1424808. Its totient is φ = 1417720.

The previous prime is 1421249. The next prime is 1421267. The reversal of 1421263 is 3621241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3621241 = 13 ⋅278557.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1421263 is a prime.

It is a Duffinian number.

1421263 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1421263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421267) 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, 1081 + ... + 2002.

It is an arithmetic number, because the mean of its divisors is an integer number (356202).

2^1421263 is an apocalyptic number.

1421263 is a deficient number, since it is larger than the sum of its proper divisors (3545).

1421263 is an equidigital number, since it uses as much as digits as its factorization.

1421263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3544.

The product of its digits is 288, while the sum is 19.

The square root of 1421263 is about 1192.1673540238. The cubic root of 1421263 is about 112.4324005410.

It can be divided in two parts, 142126 and 3, that added together give a square (142129 = 377²).

The spelling of 1421263 in words is "one million, four hundred twenty-one thousand, two hundred sixty-three".