1261504 has 28 divisors (see below), whose sum is σ = 2615184. Its totient is φ = 602624.

The previous prime is 1261489. The next prime is 1261523. The reversal of 1261504 is 4051621.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1044 + ... + 1900.

2^1261504 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 1261504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1307592).

1261504 is an abundant number, since it is smaller than the sum of its proper divisors (1353680).

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

1261504 is an equidigital number, since it uses as much as digits as its factorization.

1261504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892 (or 882 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1261504 is about 1123.1669510807. The cubic root of 1261504 is about 108.0511874410.

It can be divided in two parts, 12 and 61504, that added together give a palindrome (61516).

The spelling of 1261504 in words is "one million, two hundred sixty-one thousand, five hundred four".