1261104 has 80 divisors (see below), whose sum is σ = 3666432. Its totient is φ = 370944.

The previous prime is 1261081. The next prime is 1261109. The reversal of 1261104 is 4011621.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261109) 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, 26809 + ... + 26855.

2^1261104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1261104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1833216).

1261104 is an abundant number, since it is smaller than the sum of its proper divisors (2405328).

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

1261104 is a wasteful number, since it uses less digits than its factorization.

1261104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1261104 is about 1122.9888690455. The cubic root of 1261104 is about 108.0397658776.

Adding to 1261104 its reverse (4011621), we get a palindrome (5272725).

It can be divided in two parts, 12 and 61104, that added together give a palindrome (61116).

The spelling of 1261104 in words is "one million, two hundred sixty-one thousand, one hundred four".