7240087 has 4 divisors (see below), whose sum is σ = 7348216. Its totient is φ = 7131960.

The previous prime is 7240073. The next prime is 7240091. The reversal of 7240087 is 7800427.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7240087 is a prime.

It is a Duffinian number.

7240087 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7240097) 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, 53964 + ... + 54097.

It is an arithmetic number, because the mean of its divisors is an integer number (1837054).

Almost surely, 2^7240087 is an apocalyptic number.

7240087 is the 1554-th hex number.

7240087 is a deficient number, since it is larger than the sum of its proper divisors (108129).

7240087 is a wasteful number, since it uses less digits than its factorization.

7240087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108128.

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 7240087 is about 2690.7409760139. The cubic root of 7240087 is about 193.4555803021.

The spelling of 7240087 in words is "seven million, two hundred forty thousand, eighty-seven".