1263612 has 48 divisors (see below), whose sum is σ = 3449600. Its totient is φ = 359856.

The previous prime is 1263607. The next prime is 1263629. The reversal of 1263612 is 2163621.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3963 + ... + 4269.

2^1263612 is an apocalyptic number.

1263612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1263612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1724800).

1263612 is an abundant number, since it is smaller than the sum of its proper divisors (2185988).

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

1263612 is a wasteful number, since it uses less digits than its factorization.

1263612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335 (or 319 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

The square root of 1263612 is about 1124.1049773042. The cubic root of 1263612 is about 108.1113392255. Note that the first 3 decimals are identical.

Subtracting 1263612 from its reverse (2163621), we obtain a palindrome (900009).

The spelling of 1263612 in words is "one million, two hundred sixty-three thousand, six hundred twelve".