7867561 has 8 divisors (see below), whose sum is σ = 8495424. Its totient is φ = 7242960.

The previous prime is 7867547. The next prime is 7867571. The reversal of 7867561 is 1657687.

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

It is a cyclic number.

It is not a de Polignac number, because 7867561 - 2⁹ = 7867049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7867571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7116 + ... + 8146.

It is an arithmetic number, because the mean of its divisors is an integer number (1061928).

Almost surely, 2^7867561 is an apocalyptic number.

It is an amenable number.

7867561 is a deficient number, since it is larger than the sum of its proper divisors (627863).

7867561 is a wasteful number, since it uses less digits than its factorization.

7867561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631.

The product of its digits is 70560, while the sum is 40.

The square root of 7867561 is about 2804.9172893331. The cubic root of 7867561 is about 198.8901947188.

The spelling of 7867561 in words is "seven million, eight hundred sixty-seven thousand, five hundred sixty-one".