1261632 has 28 divisors (see below), whose sum is σ = 3338576. Its totient is φ = 420480.

The previous prime is 1261627. The next prime is 1261639. The reversal of 1261632 is 2361621.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1261599 and 1261608.

It is not an unprimeable number, because it can be changed into a prime (1261639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3094 + ... + 3477.

2^1261632 is an apocalyptic number.

1261632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1261632 is an abundant number, since it is smaller than the sum of its proper divisors (2076944).

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

1261632 is an equidigital number, since it uses as much as digits as its factorization.

1261632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6586 (or 6576 counting only the distinct ones).

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

The square root of 1261632 is about 1123.2239313690. The cubic root of 1261632 is about 108.0548418314.

The spelling of 1261632 in words is "one million, two hundred sixty-one thousand, six hundred thirty-two".