5287409 has 4 divisors (see below), whose sum is σ = 5410416. Its totient is φ = 5164404.

The previous prime is 5287393. The next prime is 5287427. The reversal of 5287409 is 9047825.

5287409 = 135² + 136² + ... + 263².

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5287409 - 2⁴ = 5287393 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5287489) 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, 61439 + ... + 61524.

It is an arithmetic number, because the mean of its divisors is an integer number (1352604).

Almost surely, 2^5287409 is an apocalyptic number.

It is an amenable number.

5287409 is a deficient number, since it is larger than the sum of its proper divisors (123007).

5287409 is a wasteful number, since it uses less digits than its factorization.

5287409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123006.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 5287409 is about 2299.4366701434. The cubic root of 5287409 is about 174.2131641254.

The spelling of 5287409 in words is "five million, two hundred eighty-seven thousand, four hundred nine".