1897442 has 4 divisors (see below), whose sum is σ = 2846166. Its totient is φ = 948720.

The previous prime is 1897429. The next prime is 1897459. The reversal of 1897442 is 2447981.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1394761 + 502681 = 1181^2 + 709^2 .

It is a super-2 number, since 2×1897442² = 7200572286728, which contains 22 as substring.

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 474359 + ... + 474362.

2^1897442 is an apocalyptic number.

1897442 is a deficient number, since it is larger than the sum of its proper divisors (948724).

1897442 is an equidigital number, since it uses as much as digits as its factorization.

1897442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948723.

The product of its digits is 16128, while the sum is 35.

The square root of 1897442 is about 1377.4766785685. The cubic root of 1897442 is about 123.8006247995.

The spelling of 1897442 in words is "one million, eight hundred ninety-seven thousand, four hundred forty-two".