7871551 has 6 divisors (see below), whose sum is σ = 8134656. Its totient is φ = 7616700.

The previous prime is 7871519. The next prime is 7871573. The reversal of 7871551 is 1551787.

It is not a de Polignac number, because 7871551 - 2⁵ = 7871519 is a prime.

It is a super-2 number, since 2×7871551² = 123922630291202, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7871581) 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 5 ways as a sum of consecutive naturals, for example, 3135 + ... + 5056.

It is an arithmetic number, because the mean of its divisors is an integer number (1355776).

Almost surely, 2^7871551 is an apocalyptic number.

7871551 is a deficient number, since it is larger than the sum of its proper divisors (263105).

7871551 is an equidigital number, since it uses as much as digits as its factorization.

7871551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8253 (or 8222 counting only the distinct ones).

The product of its digits is 9800, while the sum is 34.

The square root of 7871551 is about 2805.6284500981. The cubic root of 7871551 is about 198.9238111412.

The spelling of 7871551 in words is "seven million, eight hundred seventy-one thousand, five hundred fifty-one".