1997475 has 12 divisors (see below), whose sum is σ = 3302616. Its totient is φ = 1065280.

The previous prime is 1997473. The next prime is 1997503. The reversal of 1997475 is 5747991.

It is a happy number.

It is not a de Polignac number, because 1997475 - 2¹ = 1997473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1997473) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 13242 + ... + 13391.

It is an arithmetic number, because the mean of its divisors is an integer number (275218).

2^1997475 is an apocalyptic number.

1997475 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1997475 is a deficient number, since it is larger than the sum of its proper divisors (1305141).

1997475 is a wasteful number, since it uses less digits than its factorization.

1997475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26646 (or 26641 counting only the distinct ones).

The product of its digits is 79380, while the sum is 42.

The square root of 1997475 is about 1413.3205581184. The cubic root of 1997475 is about 125.9390609830.

The spelling of 1997475 in words is "one million, nine hundred ninety-seven thousand, four hundred seventy-five".