7242891 has 8 divisors (see below), whose sum is σ = 9669840. Its totient is φ = 4822272.

The previous prime is 7242887. The next prime is 7242943. The reversal of 7242891 is 1982427.

It is a happy number.

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

It is not a de Polignac number, because 7242891 - 2² = 7242887 is a prime.

7242891 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7242091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2931 + ... + 4803.

It is an arithmetic number, because the mean of its divisors is an integer number (1208730).

Almost surely, 2^7242891 is an apocalyptic number.

7242891 is a deficient number, since it is larger than the sum of its proper divisors (2426949).

7242891 is a wasteful number, since it uses less digits than its factorization.

7242891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3165.

The product of its digits is 8064, while the sum is 33.

The square root of 7242891 is about 2691.2619716408. The cubic root of 7242891 is about 193.4805514308.

The spelling of 7242891 in words is "seven million, two hundred forty-two thousand, eight hundred ninety-one".