1261004112 has 100 divisors (see below), whose sum is σ = 3767564416. Its totient is φ = 406762560.

The previous prime is 1261004099. The next prime is 1261004131. The reversal of 1261004112 is 2114001621.

1261004112 is a `hidden beast` number, since 1 + 2 + 610 + 0 + 41 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 19 ways as a sum of consecutive naturals, for example, 24483 + ... + 55869.

Almost surely, 2^1261004112 is an apocalyptic number.

1261004112 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 1261004112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1883782208).

1261004112 is an abundant number, since it is smaller than the sum of its proper divisors (2506560304).

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

1261004112 is a wasteful number, since it uses less digits than its factorization.

1261004112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31438 (or 31423 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1261004112 is about 35510.6197073495. The cubic root of 1261004112 is about 1080.3691330789.

Adding to 1261004112 its reverse (2114001621), we get a palindrome (3375005733).

The spelling of 1261004112 in words is "one billion, two hundred sixty-one million, four thousand, one hundred twelve".