1972257 has 16 divisors (see below), whose sum is σ = 3164160. Its totient is φ = 1067472.

The previous prime is 1972249. The next prime is 1972259. The reversal of 1972257 is 7522791.

It is not a de Polignac number, because 1972257 - 2³ = 1972249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1972259) 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, 2073 + ... + 2870.

It is an arithmetic number, because the mean of its divisors is an integer number (197760).

2^1972257 is an apocalyptic number.

It is an amenable number.

1972257 is a deficient number, since it is larger than the sum of its proper divisors (1191903).

1972257 is a wasteful number, since it uses less digits than its factorization.

1972257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4972.

The product of its digits is 8820, while the sum is 33.

The square root of 1972257 is about 1404.3706775634. The cubic root of 1972257 is about 125.4068238518.

The spelling of 1972257 in words is "one million, nine hundred seventy-two thousand, two hundred fifty-seven".