4126921 has 2 divisors, whose sum is σ = 4126922. Its totient is φ = 4126920.

The previous prime is 4126907. The next prime is 4126939. The reversal of 4126921 is 1296214.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3385600 + 741321 = 1840^2 + 861^2 .

It is a cyclic number.

It is not a de Polignac number, because 4126921 - 2¹⁹ = 3602633 is a prime.

It is not a weakly prime, because it can be changed into another prime (4126621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2063460 + 2063461.

It is an arithmetic number, because the mean of its divisors is an integer number (2063461).

Almost surely, 2^4126921 is an apocalyptic number.

It is an amenable number.

4126921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4126921 is an equidigital number, since it uses as much as digits as its factorization.

4126921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 25.

The square root of 4126921 is about 2031.4824636211. The cubic root of 4126921 is about 160.4016082865.

It can be divided in two parts, 41 and 26921, that added together give a palindrome (26962).

The spelling of 4126921 in words is "four million, one hundred twenty-six thousand, nine hundred twenty-one".