3154721 has 4 divisors (see below), whose sum is σ = 3160452. Its totient is φ = 3148992.

The previous prime is 3154717. The next prime is 3154729. The reversal of 3154721 is 1274513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1274513 = 271 ⋅4703.

It can be written as a sum of positive squares in 2 ways, for example, as 57121 + 3097600 = 239^2 + 1760^2 .

It is a cyclic number.

It is not a de Polignac number, because 3154721 - 2² = 3154717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3154729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1940 + ... + 3173.

It is an arithmetic number, because the mean of its divisors is an integer number (790113).

Almost surely, 2^3154721 is an apocalyptic number.

It is an amenable number.

3154721 is a deficient number, since it is larger than the sum of its proper divisors (5731).

3154721 is an equidigital number, since it uses as much as digits as its factorization.

3154721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5730.

The product of its digits is 840, while the sum is 23.

The square root of 3154721 is about 1776.1534280574. The cubic root of 3154721 is about 146.6629171447.

The spelling of 3154721 in words is "three million, one hundred fifty-four thousand, seven hundred twenty-one".