1298772 has 36 divisors (see below), whose sum is σ = 3363360. Its totient is φ = 422352.

The previous prime is 1298771. The next prime is 1298779. The reversal of 1298772 is 2778921.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1298771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1129 + ... + 1967.

2^1298772 is an apocalyptic number.

1298772 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 1298772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1681680).

1298772 is an abundant number, since it is smaller than the sum of its proper divisors (2064588).

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

1298772 is a wasteful number, since it uses less digits than its factorization.

1298772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892 (or 887 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 1298772 is about 1139.6367842431. The cubic root of 1298772 is about 109.1049125963.

The spelling of 1298772 in words is "one million, two hundred ninety-eight thousand, seven hundred seventy-two".