3997542 has 16 divisors (see below), whose sum is σ = 8017920. Its totient is φ = 1328712.

The previous prime is 3997507. The next prime is 3997547. The reversal of 3997542 is 2457993.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 3997542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3997547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2059 + ... + 3497.

It is an arithmetic number, because the mean of its divisors is an integer number (501120).

Almost surely, 2^3997542 is an apocalyptic number.

3997542 is an abundant number, since it is smaller than the sum of its proper divisors (4020378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3997542 is a wasteful number, since it uses less digits than its factorization.

3997542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1907.

The product of its digits is 68040, while the sum is 39.

The square root of 3997542 is about 1999.3854055684. The cubic root of 3997542 is about 158.7075832695.

The spelling of 3997542 in words is "three million, nine hundred ninety-seven thousand, five hundred forty-two".