1971249 has 32 divisors (see below), whose sum is σ = 3210240. Its totient is φ = 1052352.

The previous prime is 1971241. The next prime is 1971251. The reversal of 1971249 is 9421791.

It is not a de Polignac number, because 1971249 - 2³ = 1971241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1971241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33382 + ... + 33440.

It is an arithmetic number, because the mean of its divisors is an integer number (100320).

2^1971249 is an apocalyptic number.

It is an amenable number.

1971249 is a deficient number, since it is larger than the sum of its proper divisors (1238991).

1971249 is a wasteful number, since it uses less digits than its factorization.

1971249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149.

The product of its digits is 4536, while the sum is 33.

The square root of 1971249 is about 1404.0117520876. The cubic root of 1971249 is about 125.3854555040.

Subtracting from 1971249 its sum of digits (33), we obtain a square (1971216 = 1404²).

The spelling of 1971249 in words is "one million, nine hundred seventy-one thousand, two hundred forty-nine".