3971458 has 4 divisors (see below), whose sum is σ = 5957190. Its totient is φ = 1985728.

The previous prime is 3971431. The next prime is 3971459. The reversal of 3971458 is 8541793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8541793 = 13 ⋅657061.

It can be written as a sum of positive squares in only one way, i.e., 3697929 + 273529 = 1923^2 + 523^2 .

It is not an unprimeable number, because it can be changed into a prime (3971459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 992863 + ... + 992866.

Almost surely, 2^3971458 is an apocalyptic number.

3971458 is a deficient number, since it is larger than the sum of its proper divisors (1985732).

3971458 is a wasteful number, since it uses less digits than its factorization.

3971458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1985731.

The product of its digits is 30240, while the sum is 37.

The square root of 3971458 is about 1992.8517255431. The cubic root of 3971458 is about 158.3616402452.

The spelling of 3971458 in words is "three million, nine hundred seventy-one thousand, four hundred fifty-eight".