3970426 has 4 divisors (see below), whose sum is σ = 5955642. Its totient is φ = 1985212.

The previous prime is 3970423. The next prime is 3970441. The reversal of 3970426 is 6240793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6240793 = 13 ⋅480061.

It can be written as a sum of positive squares in only one way, i.e., 3806401 + 164025 = 1951^2 + 405^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (3970423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 992605 + ... + 992608.

Almost surely, 2^3970426 is an apocalyptic number.

3970426 is a deficient number, since it is larger than the sum of its proper divisors (1985216).

3970426 is a wasteful number, since it uses less digits than its factorization.

3970426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1985215.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 3970426 is about 1992.5927832851. The cubic root of 3970426 is about 158.3479220784.

The spelling of 3970426 in words is "three million, nine hundred seventy thousand, four hundred twenty-six".