7240861 has 8 divisors (see below), whose sum is σ = 7725240. Its totient is φ = 6763008.

The previous prime is 7240859. The next prime is 7240873. The reversal of 7240861 is 1680427.

It can be written as a sum of positive squares in 4 ways, for example, as 1144900 + 6095961 = 1070^2 + 2469^2 .

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

It is not a de Polignac number, because 7240861 - 2¹ = 7240859 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 (7240811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 775 + ... + 3883.

It is an arithmetic number, because the mean of its divisors is an integer number (965655).

Almost surely, 2^7240861 is an apocalyptic number.

It is an amenable number.

7240861 is a deficient number, since it is larger than the sum of its proper divisors (484379).

7240861 is a wasteful number, since it uses less digits than its factorization.

7240861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3263.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 7240861 is about 2690.8847987233. The cubic root of 7240861 is about 193.4624738327.

The spelling of 7240861 in words is "seven million, two hundred forty thousand, eight hundred sixty-one".