5157445 has 4 divisors (see below), whose sum is σ = 6188940. Its totient is φ = 4125952.

The previous prime is 5157421. The next prime is 5157457. The reversal of 5157445 is 5447515.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5447515 = 5 ⋅1089503.

It can be written as a sum of positive squares in 2 ways, for example, as 1852321 + 3305124 = 1361^2 + 1818^2 .

It is a cyclic number.

It is not a de Polignac number, because 5157445 - 2¹⁹ = 4633157 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

5157445 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 515740 + ... + 515749.

It is an arithmetic number, because the mean of its divisors is an integer number (1547235).

Almost surely, 2^5157445 is an apocalyptic number.

It is an amenable number.

5157445 is a deficient number, since it is larger than the sum of its proper divisors (1031495).

5157445 is a wasteful number, since it uses less digits than its factorization.

5157445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031494.

The product of its digits is 14000, while the sum is 31.

The square root of 5157445 is about 2271.0008806691. Note that the first 3 decimals coincide. The cubic root of 5157445 is about 172.7739259105.

The spelling of 5157445 in words is "five million, one hundred fifty-seven thousand, four hundred forty-five".