4149981 has 32 divisors (see below), whose sum is σ = 6825600. Its totient is φ = 2471040.

The previous prime is 4149967. The next prime is 4149983. The reversal of 4149981 is 1899414.

It is not a de Polignac number, because 4149981 - 2⁹ = 4149469 is a prime.

It is a super-2 number, since 2×4149981² = 34444684600722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4149983) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26355 + ... + 26511.

It is an arithmetic number, because the mean of its divisors is an integer number (213300).

Almost surely, 2^4149981 is an apocalyptic number.

It is an amenable number.

4149981 is a deficient number, since it is larger than the sum of its proper divisors (2675619).

4149981 is a wasteful number, since it uses less digits than its factorization.

4149981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266 (or 260 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 4149981 is about 2037.1502153744. The cubic root of 4149981 is about 160.6998122839.

The spelling of 4149981 in words is "four million, one hundred forty-nine thousand, nine hundred eighty-one".