5721145 has 8 divisors (see below), whose sum is σ = 6933960. Its totient is φ = 4531200.

The previous prime is 5721139. The next prime is 5721151. The reversal of 5721145 is 5411275.

It is an interprime number because it is at equal distance from previous prime (5721139) and next prime (5721151).

It can be written as a sum of positive squares in 4 ways, for example, as 1510441 + 4210704 = 1229^2 + 2052^2 .

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

It is not a de Polignac number, because 5721145 - 2⁵ = 5721113 is a prime.

It is a super-2 number, since 2×5721145² = 65463000222050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5160 + ... + 6169.

It is an arithmetic number, because the mean of its divisors is an integer number (866745).

Almost surely, 2^5721145 is an apocalyptic number.

It is an amenable number.

5721145 is a deficient number, since it is larger than the sum of its proper divisors (1212815).

5721145 is a wasteful number, since it uses less digits than its factorization.

5721145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11435.

The product of its digits is 1400, while the sum is 25.

The square root of 5721145 is about 2391.8915109177. The cubic root of 5721145 is about 178.8522130460.

It can be divided in two parts, 572 and 1145, that multiplied together give a triangular number (654940 = T₁₁₄₄).

The spelling of 5721145 in words is "five million, seven hundred twenty-one thousand, one hundred forty-five".