1897971 has 8 divisors (see below), whose sum is σ = 2573760. Its totient is φ = 1243752.

The previous prime is 1897969. The next prime is 1897979. The reversal of 1897971 is 1797981.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1897971 - 2¹ = 1897969 is a prime.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (1897979) 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, 5185 + ... + 5538.

It is an arithmetic number, because the mean of its divisors is an integer number (321720).

2^1897971 is an apocalyptic number.

1897971 is a deficient number, since it is larger than the sum of its proper divisors (675789).

1897971 is a wasteful number, since it uses less digits than its factorization.

1897971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10785.

The product of its digits is 31752, while the sum is 42.

The square root of 1897971 is about 1377.6686829568. The cubic root of 1897971 is about 123.8121287866.

The spelling of 1897971 in words is "one million, eight hundred ninety-seven thousand, nine hundred seventy-one".