7240854521 has 4 divisors (see below), whose sum is σ = 7244446452. Its totient is φ = 7237262592.

The previous prime is 7240854497. The next prime is 7240854547. The reversal of 7240854521 is 1254580427.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6294676921 + 946177600 = 79339^2 + 30760^2 .

It is a cyclic number.

It is not a de Polignac number, because 7240854521 - 2¹⁰ = 7240853497 is a prime.

It is a super-2 number, since 2×7240854521² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7240851521) 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, 1792940 + ... + 1796973.

It is an arithmetic number, because the mean of its divisors is an integer number (1811111613).

Almost surely, 2^7240854521 is an apocalyptic number.

It is an amenable number.

7240854521 is a deficient number, since it is larger than the sum of its proper divisors (3591931).

7240854521 is a wasteful number, since it uses less digits than its factorization.

7240854521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3591930.

The product of its (nonzero) digits is 89600, while the sum is 38.

The square root of 7240854521 is about 85093.2107808843. The cubic root of 7240854521 is about 1934.6241613035.

The spelling of 7240854521 in words is "seven billion, two hundred forty million, eight hundred fifty-four thousand, five hundred twenty-one".