7557481 has 4 divisors (see below), whose sum is σ = 7568964. Its totient is φ = 7546000.

The previous prime is 7557479. The next prime is 7557493. The reversal of 7557481 is 1847557.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1847557 = 73 ⋅25309.

It can be written as a sum of positive squares in 2 ways, for example, as 4477456 + 3080025 = 2116^2 + 1755^2 .

It is a cyclic number.

It is not a de Polignac number, because 7557481 - 2¹ = 7557479 is a prime.

It is a super-2 number, since 2×7557481² = 114231038130722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7557481.

It is not an unprimeable number, because it can be changed into a prime (7557181) 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, 4690 + ... + 6091.

It is an arithmetic number, because the mean of its divisors is an integer number (1892241).

Almost surely, 2^7557481 is an apocalyptic number.

It is an amenable number.

7557481 is a deficient number, since it is larger than the sum of its proper divisors (11483).

7557481 is a wasteful number, since it uses less digits than its factorization.

7557481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11482.

The product of its digits is 39200, while the sum is 37.

The square root of 7557481 is about 2749.0873030881. The cubic root of 7557481 is about 196.2421777347.

The spelling of 7557481 in words is "seven million, five hundred fifty-seven thousand, four hundred eighty-one".