1091602 has 8 divisors (see below), whose sum is σ = 1644300. Its totient is φ = 543504.

The previous prime is 1091591. The next prime is 1091609. The reversal of 1091602 is 2061901.

It can be written as a sum of positive squares in 2 ways, for example, as 1083681 + 7921 = 1041^2 + 89^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1091602.

It is not an unprimeable number, because it can be changed into a prime (1091609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477 + ... + 1552.

2^1091602 is an apocalyptic number.

1091602 is a deficient number, since it is larger than the sum of its proper divisors (552698).

1091602 is a wasteful number, since it uses less digits than its factorization.

1091602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2300.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1091602 is about 1044.7975880523. The cubic root of 1091602 is about 102.9646405160.

Subtracting 1091602 from its reverse (2061901), we obtain a cube (970299 = 99³).

It can be divided in two parts, 109 and 1602, that added together give a triangular number (1711 = T₅₈).

The spelling of 1091602 in words is "one million, ninety-one thousand, six hundred two".