7140091 has 4 divisors (see below), whose sum is σ = 8160112. Its totient is φ = 6120072.

The previous prime is 7140083. The next prime is 7140101. The reversal of 7140091 is 1900417.

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

It is not a de Polignac number, because 7140091 - 2³ = 7140083 is a prime.

It is a Duffinian number.

7140091 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7140011) 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, 510000 + ... + 510013.

It is an arithmetic number, because the mean of its divisors is an integer number (2040028).

Almost surely, 2^7140091 is an apocalyptic number.

7140091 is a deficient number, since it is larger than the sum of its proper divisors (1020021).

7140091 is a wasteful number, since it uses less digits than its factorization.

7140091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020020.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 7140091 is about 2672.0948710703. The cubic root of 7140091 is about 192.5608151023.

The spelling of 7140091 in words is "seven million, one hundred forty thousand, ninety-one".