869742 has 24 divisors (see below), whose sum is σ = 1901640. Its totient is φ = 287280.

The previous prime is 869717. The next prime is 869747. The reversal of 869742 is 247968.

It is a super-2 number, since 2×869742² = 1512902293128, which contains 22 as substring.

It is an Ulam number.

Its product of digits (24192) is a multiple of the sum of its prime factors (448).

It is a junction number, because it is equal to n+sod(n) for n = 869697 and 869706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869747) by changing a digit.

869742 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 11 ways as a sum of consecutive naturals, for example, 3684 + ... + 3912.

It is an arithmetic number, because the mean of its divisors is an integer number (79235).

869742 is a Friedman number, since it can be written as 6^7+9*(4^8-2), using all its digits and the basic arithmetic operations.

2⁸⁶⁹⁷⁴² is an apocalyptic number.

869742 is an abundant number, since it is smaller than the sum of its proper divisors (1031898).

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

869742 is a wasteful number, since it uses less digits than its factorization.

869742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448 (or 445 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 869742 is about 932.5995925369. The cubic root of 869742 is about 95.4545894867.

The spelling of 869742 in words is "eight hundred sixty-nine thousand, seven hundred forty-two".