4721145 has 64 divisors (see below), whose sum is σ = 9289728. Its totient is φ = 2016000.

The previous prime is 4721137. The next prime is 4721149. The reversal of 4721145 is 5411274.

It is not a de Polignac number, because 4721145 - 2³ = 4721137 is a prime.

It is a super-2 number, since 2×4721145² = 44578420222050, which contains 22 as substring.

It is a Curzon number.

4721145 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4721149) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 66460 + ... + 66530.

It is an arithmetic number, because the mean of its divisors is an integer number (145152).

Almost surely, 2^4721145 is an apocalyptic number.

It is an amenable number.

4721145 is a deficient number, since it is larger than the sum of its proper divisors (4568583).

4721145 is a wasteful number, since it uses less digits than its factorization.

4721145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134.

The product of its digits is 1120, while the sum is 24.

The square root of 4721145 is about 2172.8195967452. The cubic root of 4721145 is about 167.7576934896.

The spelling of 4721145 in words is "four million, seven hundred twenty-one thousand, one hundred forty-five".