1691064 has 32 divisors (see below), whose sum is σ = 4698000. Its totient is φ = 563616.

The previous prime is 1691051. The next prime is 1691069. The reversal of 1691064 is 4601961.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1691069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3699 + ... + 4130.

2^1691064 is an apocalyptic number.

It is an amenable number.

1691064 is an abundant number, since it is smaller than the sum of its proper divisors (3006936).

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

1691064 is a wasteful number, since it uses less digits than its factorization.

1691064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7844 (or 7834 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1691064 is about 1300.4091663780. The cubic root of 1691064 is about 119.1388347367.

The spelling of 1691064 in words is "one million, six hundred ninety-one thousand, sixty-four".