5145721 has 16 divisors (see below), whose sum is σ = 6340608. Its totient is φ = 4078800.

The previous prime is 5145719. The next prime is 5145727. The reversal of 5145721 is 1275415.

It is a cyclic number.

It is not a de Polignac number, because 5145721 - 2¹ = 5145719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5145727) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4476 + ... + 5506.

It is an arithmetic number, because the mean of its divisors is an integer number (396288).

Almost surely, 2^5145721 is an apocalyptic number.

It is an amenable number.

5145721 is a deficient number, since it is larger than the sum of its proper divisors (1194887).

5145721 is a wasteful number, since it uses less digits than its factorization.

5145721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092.

The product of its digits is 1400, while the sum is 25.

The square root of 5145721 is about 2268.4181713256. The cubic root of 5145721 is about 172.6429089485.

The spelling of 5145721 in words is "five million, one hundred forty-five thousand, seven hundred twenty-one".