7513081 has 3 divisors (see below), whose sum is σ = 7515823. Its totient is φ = 7510340.

The previous prime is 7513073. The next prime is 7513123. The reversal of 7513081 is 1803157.

The square root of 7513081 is 2741.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1803157 = 19 ⋅94903.

It can be written as a sum of positive squares in only one way, i.e., 2223081 + 5290000 = 1491^2 + 2300^2 .

It is not a de Polignac number, because 7513081 - 2³ = 7513073 is a prime.

It is a super-2 number, since 2×7513081² = 112892772225122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7513021) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1371 + ... + 4111.

Almost surely, 2^7513081 is an apocalyptic number.

7513081 is the 2741-st square number.

7513081 is the 1371-st centered octagonal number.

It is an amenable number.

7513081 is a deficient number, since it is larger than the sum of its proper divisors (2742).

7513081 is an frugal number, since it uses more digits than its factorization.

7513081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5482 (or 2741 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 25.

The cubic root of 7513081 is about 195.8571168137.

Multiplying 7513081 by its sum of digits (25), we get a square (187827025 = 13705²).

The spelling of 7513081 in words is "seven million, five hundred thirteen thousand, eighty-one".