7981546 has 4 divisors (see below), whose sum is σ = 11972322. Its totient is φ = 3990772.

The previous prime is 7981537. The next prime is 7981553. The reversal of 7981546 is 6451897.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7349521 + 632025 = 2711^2 + 795^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 7981499 and 7981508.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1995385 + ... + 1995388.

Almost surely, 2^7981546 is an apocalyptic number.

7981546 is a deficient number, since it is larger than the sum of its proper divisors (3990776).

7981546 is a wasteful number, since it uses less digits than its factorization.

7981546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3990775.

The product of its digits is 60480, while the sum is 40.

The square root of 7981546 is about 2825.1630041468. The cubic root of 7981546 is about 199.8460982683.

The spelling of 7981546 in words is "seven million, nine hundred eighty-one thousand, five hundred forty-six".