7015861 has 4 divisors (see below), whose sum is σ = 7071232. Its totient is φ = 6960492.

The previous prime is 7015823. The next prime is 7015891. The reversal of 7015861 is 1685107.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7015861 - 2⁷ = 7015733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7015891) 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 3 ways as a sum of consecutive naturals, for example, 27495 + ... + 27748.

It is an arithmetic number, because the mean of its divisors is an integer number (1767808).

Almost surely, 2^7015861 is an apocalyptic number.

It is an amenable number.

7015861 is a deficient number, since it is larger than the sum of its proper divisors (55371).

7015861 is a wasteful number, since it uses less digits than its factorization.

7015861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55370.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 7015861 is about 2648.7470622919. The cubic root of 7015861 is about 191.4374902495.

It can be divided in two parts, 70 and 15861, that added together give a triangular number (15931 = T₁₇₈).

The spelling of 7015861 in words is "seven million, fifteen thousand, eight hundred sixty-one".