7142991 has 4 divisors (see below), whose sum is σ = 9523992. Its totient is φ = 4761992.

The previous prime is 7142987. The next prime is 7143001. The reversal of 7142991 is 1992417.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7142991 - 2² = 7142987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7142951) 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, 1190496 + ... + 1190501.

It is an arithmetic number, because the mean of its divisors is an integer number (2380998).

Almost surely, 2^7142991 is an apocalyptic number.

7142991 is a deficient number, since it is larger than the sum of its proper divisors (2381001).

7142991 is a wasteful number, since it uses less digits than its factorization.

7142991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2381000.

The product of its digits is 4536, while the sum is 33.

The square root of 7142991 is about 2672.6374613853. The cubic root of 7142991 is about 192.5868815664.

The spelling of 7142991 in words is "seven million, one hundred forty-two thousand, nine hundred ninety-one".