1671428 has 12 divisors (see below), whose sum is σ = 3190992. Its totient is φ = 759720.

The previous prime is 1671421. The next prime is 1671431. The reversal of 1671428 is 8241761.

It is a self number, because there is not a number n which added to its sum of digits gives 1671428.

It is not an unprimeable number, because it can be changed into a prime (1671421) 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, 18950 + ... + 19037.

It is an arithmetic number, because the mean of its divisors is an integer number (265916).

2^1671428 is an apocalyptic number.

It is an amenable number.

1671428 is a deficient number, since it is larger than the sum of its proper divisors (1519564).

1671428 is a wasteful number, since it uses less digits than its factorization.

1671428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38002 (or 38000 counting only the distinct ones).

The product of its digits is 2688, while the sum is 29.

The square root of 1671428 is about 1292.8371900591. The cubic root of 1671428 is about 118.6759065032.

The spelling of 1671428 in words is "one million, six hundred seventy-one thousand, four hundred twenty-eight".