4053981 has 4 divisors (see below), whose sum is σ = 5405312. Its totient is φ = 2702652.

The previous prime is 4053971. The next prime is 4053983. The reversal of 4053981 is 1893504.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 4053981 - 2¹⁰ = 4052957 is a prime.

It is a super-2 number, since 2×4053981² = 32869523896722, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4053983) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 675661 + ... + 675666.

It is an arithmetic number, because the mean of its divisors is an integer number (1351328).

Almost surely, 2^4053981 is an apocalyptic number.

It is an amenable number.

4053981 is a deficient number, since it is larger than the sum of its proper divisors (1351331).

4053981 is a wasteful number, since it uses less digits than its factorization.

4053981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1351330.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 4053981 is about 2013.4500242122. The cubic root of 4053981 is about 159.4509959749.

The spelling of 4053981 in words is "four million, fifty-three thousand, nine hundred eighty-one".