1897489 has 16 divisors (see below), whose sum is σ = 2237760. Its totient is φ = 1589760.

The previous prime is 1897481. The next prime is 1897517. The reversal of 1897489 is 9847981.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1897489 - 2³ = 1897481 is a prime.

It is a Duffinian number.

1897489 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1897481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13582 + ... + 13720.

It is an arithmetic number, because the mean of its divisors is an integer number (139860).

2^1897489 is an apocalyptic number.

It is an amenable number.

1897489 is a deficient number, since it is larger than the sum of its proper divisors (340271).

1897489 is a wasteful number, since it uses less digits than its factorization.

1897489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240.

The product of its digits is 145152, while the sum is 46.

The square root of 1897489 is about 1377.4937386428. The cubic root of 1897489 is about 123.8016469794.

The spelling of 1897489 in words is "one million, eight hundred ninety-seven thousand, four hundred eighty-nine".