1263620 has 48 divisors (see below), whose sum is σ = 2878848. Its totient is φ = 464640.

The previous prime is 1263607. The next prime is 1263629. The reversal of 1263620 is 263621.

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 = 1263592 and 1263601.

It is not an unprimeable number, because it can be changed into a prime (1263629) 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, 18827 + ... + 18893.

It is an arithmetic number, because the mean of its divisors is an integer number (59976).

2^1263620 is an apocalyptic number.

1263620 is a gapful number since it is divisible by the number (10) 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 1263620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1439424).

1263620 is an abundant number, since it is smaller than the sum of its proper divisors (1615228).

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

1263620 is a wasteful number, since it uses less digits than its factorization.

1263620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1263620 is about 1124.1085356851. The cubic root of 1263620 is about 108.1115673780. Note that the first 3 decimals are identical.

Subtracting from 1263620 its reverse (263621), we obtain a palindrome (999999).

The spelling of 1263620 in words is "one million, two hundred sixty-three thousand, six hundred twenty".