3997522 has 4 divisors (see below), whose sum is σ = 5996286. Its totient is φ = 1998760.

The previous prime is 3997507. The next prime is 3997547. The reversal of 3997522 is 2257993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2257993 = 41 ⋅55073.

It can be written as a sum of positive squares in only one way, i.e., 3996001 + 1521 = 1999^2 + 39^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999379 + ... + 999382.

Almost surely, 2^3997522 is an apocalyptic number.

3997522 is a deficient number, since it is larger than the sum of its proper divisors (1998764).

3997522 is a wasteful number, since it uses less digits than its factorization.

3997522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998763.

The product of its digits is 34020, while the sum is 37.

The square root of 3997522 is about 1999.3804040252. The cubic root of 3997522 is about 158.7073185937.

It can be divided in two parts, 399 and 7522, that added together give a square (7921 = 89²).

The spelling of 3997522 in words is "three million, nine hundred ninety-seven thousand, five hundred twenty-two".