1291602 has 32 divisors (see below), whose sum is σ = 2882880. Its totient is φ = 383040.

The previous prime is 1291579. The next prime is 1291603. The reversal of 1291602 is 2061921.

It is not an unprimeable number, because it can be changed into a prime (1291603) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1977 + ... + 2547.

It is an arithmetic number, because the mean of its divisors is an integer number (90090).

2^1291602 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1291602, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1441440).

1291602 is an abundant number, since it is smaller than the sum of its proper divisors (1591278).

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

1291602 is a wasteful number, since it uses less digits than its factorization.

1291602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 1291602 is about 1136.4866915191. The cubic root of 1291602 is about 108.9037671527.

The spelling of 1291602 in words is "one million, two hundred ninety-one thousand, six hundred two".