7490285521 has 4 divisors (see below), whose sum is σ = 7490657844. Its totient is φ = 7489913200.

The previous prime is 7490285497. The next prime is 7490285563. The reversal of 7490285521 is 1255820947.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1255820947 = 1699 ⋅739153.

It can be written as a sum of positive squares in 2 ways, for example, as 6684861121 + 805424400 = 81761^2 + 28380^2 .

It is a cyclic number.

It is not a de Polignac number, because 7490285521 - 2⁵ = 7490285489 is a prime.

It is a super-2 number, since 2×7490285521² (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 (7490285581) 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, 154150 + ... + 196831.

It is an arithmetic number, because the mean of its divisors is an integer number (1872664461).

Almost surely, 2^7490285521 is an apocalyptic number.

It is an amenable number.

7490285521 is a deficient number, since it is larger than the sum of its proper divisors (372323).

7490285521 is a wasteful number, since it uses less digits than its factorization.

7490285521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372322.

The product of its (nonzero) digits is 201600, while the sum is 43.

The square root of 7490285521 is about 86546.4356342883. The cubic root of 7490285521 is about 1956.5883243326.

The spelling of 7490285521 in words is "seven billion, four hundred ninety million, two hundred eighty-five thousand, five hundred twenty-one".