4128722 has 16 divisors (see below), whose sum is σ = 7062552. Its totient is φ = 1793280.

The previous prime is 4128713. The next prime is 4128743. The reversal of 4128722 is 2278214.

It can be written as a sum of positive squares in 4 ways, for example, as 3024121 + 1104601 = 1739^2 + 1051^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 4128691 and 4128700.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4229 + ... + 5112.

Almost surely, 2^4128722 is an apocalyptic number.

4128722 is a deficient number, since it is larger than the sum of its proper divisors (2933830).

4128722 is a wasteful number, since it uses less digits than its factorization.

4128722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9373.

The product of its digits is 1792, while the sum is 26.

The square root of 4128722 is about 2031.9256876175. The cubic root of 4128722 is about 160.4249381316.

The spelling of 4128722 in words is "four million, one hundred twenty-eight thousand, seven hundred twenty-two".