1972394 has 4 divisors (see below), whose sum is σ = 2958594. Its totient is φ = 986196.

The previous prime is 1972381. The next prime is 1972417. The reversal of 1972394 is 4932791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4932791 = 47 ⋅104953.

It can be written as a sum of positive squares in only one way, i.e., 1530169 + 442225 = 1237^2 + 665^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493097 + ... + 493100.

2^1972394 is an apocalyptic number.

1972394 is a deficient number, since it is larger than the sum of its proper divisors (986200).

1972394 is an equidigital number, since it uses as much as digits as its factorization.

1972394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986199.

The product of its digits is 13608, while the sum is 35.

The square root of 1972394 is about 1404.4194530125. The cubic root of 1972394 is about 125.4097275195.

The spelling of 1972394 in words is "one million, nine hundred seventy-two thousand, three hundred ninety-four".