5251405 has 4 divisors (see below), whose sum is σ = 6301692. Its totient is φ = 4201120.

The previous prime is 5251361. The next prime is 5251409. The reversal of 5251405 is 5041525.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 594441 + 4656964 = 771^2 + 2158^2 .

It is not a de Polignac number, because 5251405 - 2¹⁷ = 5120333 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5251409) 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, 525136 + ... + 525145.

It is an arithmetic number, because the mean of its divisors is an integer number (1575423).

Almost surely, 2^5251405 is an apocalyptic number.

It is an amenable number.

5251405 is a deficient number, since it is larger than the sum of its proper divisors (1050287).

5251405 is a wasteful number, since it uses less digits than its factorization.

5251405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050286.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 5251405 is about 2291.5944231037. The cubic root of 5251405 is about 173.8168350438.

The spelling of 5251405 in words is "five million, two hundred fifty-one thousand, four hundred five".