3972530 has 8 divisors (see below), whose sum is σ = 7150572. Its totient is φ = 1589008.

The previous prime is 3972523. The next prime is 3972533. The reversal of 3972530 is 352793.

It can be written as a sum of positive squares in 2 ways, for example, as 3265249 + 707281 = 1807^2 + 841^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 3972493 and 3972502.

It is not an unprimeable number, because it can be changed into a prime (3972533) 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 in 3 ways as a sum of consecutive naturals, for example, 198617 + ... + 198636.

Almost surely, 2^3972530 is an apocalyptic number.

3972530 is a deficient number, since it is larger than the sum of its proper divisors (3178042).

3972530 is a wasteful number, since it uses less digits than its factorization.

3972530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397260.

The product of its (nonzero) digits is 5670, while the sum is 29.

The square root of 3972530 is about 1993.1206687002. The cubic root of 3972530 is about 158.3758876078.

The spelling of 3972530 in words is "three million, nine hundred seventy-two thousand, five hundred thirty".