7420091 has 8 divisors (see below), whose sum is σ = 8709600. Its totient is φ = 6187968.

The previous prime is 7420079. The next prime is 7420097. The reversal of 7420091 is 1900247.

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

It is a cyclic number.

It is not a de Polignac number, because 7420091 - 2¹⁰ = 7419067 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 (7420097) 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 7 ways as a sum of consecutive naturals, for example, 14066 + ... + 14583.

It is an arithmetic number, because the mean of its divisors is an integer number (1088700).

Almost surely, 2^7420091 is an apocalyptic number.

7420091 is a deficient number, since it is larger than the sum of its proper divisors (1289509).

7420091 is a wasteful number, since it uses less digits than its factorization.

7420091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28693.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 7420091 is about 2723.9843978995. The cubic root of 7420091 is about 195.0457135868.

The spelling of 7420091 in words is "seven million, four hundred twenty thousand, ninety-one".