1642734 has 32 divisors (see below), whose sum is σ = 3780000. Its totient is φ = 528192.

The previous prime is 1642723. The next prime is 1642741. The reversal of 1642734 is 4372461.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1642698 and 1642707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1042 + ... + 2090.

It is an arithmetic number, because the mean of its divisors is an integer number (118125).

2^1642734 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1642734, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1890000).

1642734 is an abundant number, since it is smaller than the sum of its proper divisors (2137266).

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

1642734 is a wasteful number, since it uses less digits than its factorization.

1642734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089 (or 1083 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 1642734 is about 1281.6918506412. The cubic root of 1642734 is about 117.9928656033.

It can be divided in two parts, 16427 and 34, that added together give a palindrome (16461).

The spelling of 1642734 in words is "one million, six hundred forty-two thousand, seven hundred thirty-four".