4971545 has 4 divisors (see below), whose sum is σ = 5965860. Its totient is φ = 3977232.

The previous prime is 4971529. The next prime is 4971553. The reversal of 4971545 is 5451794.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5451794 = 2 ⋅2725897.

It can be written as a sum of positive squares in 2 ways, for example, as 2550409 + 2421136 = 1597^2 + 1556^2 .

It is a cyclic number.

It is not a de Polignac number, because 4971545 - 2⁴ = 4971529 is a prime.

It is an Ulam number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 497150 + ... + 497159.

It is an arithmetic number, because the mean of its divisors is an integer number (1491465).

Almost surely, 2^4971545 is an apocalyptic number.

It is an amenable number.

4971545 is a deficient number, since it is larger than the sum of its proper divisors (994315).

4971545 is an equidigital number, since it uses as much as digits as its factorization.

4971545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994314.

The product of its digits is 25200, while the sum is 35.

The square root of 4971545 is about 2229.6961676426. The cubic root of 4971545 is about 170.6725949241.

Subtracting 4971545 from its reverse (5451794), we obtain a square (480249 = 693²).

The spelling of 4971545 in words is "four million, nine hundred seventy-one thousand, five hundred forty-five".