7987451 has 4 divisors (see below), whose sum is σ = 8003304. Its totient is φ = 7971600.

The previous prime is 7987439. The next prime is 7987457. The reversal of 7987451 is 1547897.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1547897 = 13 ⋅119069.

It is a cyclic number.

It is not a de Polignac number, because 7987451 - 2⁶ = 7987387 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7987399 and 7987408.

It is not an unprimeable number, because it can be changed into a prime (7987457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7145 + ... + 8186.

It is an arithmetic number, because the mean of its divisors is an integer number (2000826).

Almost surely, 2^7987451 is an apocalyptic number.

7987451 is a deficient number, since it is larger than the sum of its proper divisors (15853).

7987451 is a wasteful number, since it uses less digits than its factorization.

7987451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15852.

The product of its digits is 70560, while the sum is 41.

The square root of 7987451 is about 2826.2078833660. The cubic root of 7987451 is about 199.8953702726.

The spelling of 7987451 in words is "seven million, nine hundred eighty-seven thousand, four hundred fifty-one".