7661143 has 4 divisors (see below), whose sum is σ = 8755600. Its totient is φ = 6566688.

The previous prime is 7661119. The next prime is 7661189. The reversal of 7661143 is 3411667.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3411667 = 7 ⋅487381.

It is a cyclic number.

It is not a de Polignac number, because 7661143 - 2⁵ = 7661111 is a prime.

It is a super-2 number, since 2×7661143² = 117386224132898, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7662143) 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, 547218 + ... + 547231.

It is an arithmetic number, because the mean of its divisors is an integer number (2188900).

Almost surely, 2^7661143 is an apocalyptic number.

7661143 is a deficient number, since it is larger than the sum of its proper divisors (1094457).

7661143 is a wasteful number, since it uses less digits than its factorization.

7661143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094456.

The product of its digits is 3024, while the sum is 28.

The square root of 7661143 is about 2767.8769842607. The cubic root of 7661143 is about 197.1353566575.

The spelling of 7661143 in words is "seven million, six hundred sixty-one thousand, one hundred forty-three".