7861142 has 4 divisors (see below), whose sum is σ = 11791716. Its totient is φ = 3930570.

The previous prime is 7861141. The next prime is 7861153. The reversal of 7861142 is 2411687.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2411687 = 241 ⋅10007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7861141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1965284 + ... + 1965287.

It is an arithmetic number, because the mean of its divisors is an integer number (2947929).

Almost surely, 2^7861142 is an apocalyptic number.

7861142 is a deficient number, since it is larger than the sum of its proper divisors (3930574).

7861142 is a wasteful number, since it uses less digits than its factorization.

7861142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3930573.

The product of its digits is 2688, while the sum is 29.

The square root of 7861142 is about 2803.7728153329. The cubic root of 7861142 is about 198.8360897036.

The spelling of 7861142 in words is "seven million, eight hundred sixty-one thousand, one hundred forty-two".