4269721 has 2 divisors, whose sum is σ = 4269722. Its totient is φ = 4269720.

The previous prime is 4269691. The next prime is 4269767. The reversal of 4269721 is 1279624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3956121 + 313600 = 1989^2 + 560^2 .

It is a cyclic number.

It is not a de Polignac number, because 4269721 - 2⁷ = 4269593 is a prime.

It is not a weakly prime, because it can be changed into another prime (4269821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2134860 + 2134861.

It is an arithmetic number, because the mean of its divisors is an integer number (2134861).

Almost surely, 2^4269721 is an apocalyptic number.

4269721 is the 1105-th centered heptagonal number.

It is an amenable number.

4269721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4269721 is an equidigital number, since it uses as much as digits as its factorization.

4269721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 31.

The square root of 4269721 is about 2066.3303220928. The cubic root of 4269721 is about 162.2307462178.

The spelling of 4269721 in words is "four million, two hundred sixty-nine thousand, seven hundred twenty-one".