1261646232 has 128 divisors (see below), whose sum is σ = 4103516160. Its totient is φ = 313441920.

The previous prime is 1261646173. The next prime is 1261646233. The reversal of 1261646232 is 2326461621.

It is a Harshad number since it is a multiple of its sum of digits (33).

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 = 1261646193 and 1261646202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261646233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27663 + ... + 57345.

It is an arithmetic number, because the mean of its divisors is an integer number (32058720).

Almost surely, 2^1261646232 is an apocalyptic number.

1261646232 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 1261646232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2051758080).

1261646232 is an abundant number, since it is smaller than the sum of its proper divisors (2841869928).

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

1261646232 is a wasteful number, since it uses less digits than its factorization.

1261646232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29733 (or 29729 counting only the distinct ones).

The product of its digits is 20736, while the sum is 33.

The square root of 1261646232 is about 35519.6597956681. The cubic root of 1261646232 is about 1080.5524813865.

The spelling of 1261646232 in words is "one billion, two hundred sixty-one million, six hundred forty-six thousand, two hundred thirty-two".