4100381 has 2 divisors, whose sum is σ = 4100382. Its totient is φ = 4100380.

The previous prime is 4100311. The next prime is 4100399. The reversal of 4100381 is 1830014.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3865156 + 235225 = 1966^2 + 485^2 .

It is a cyclic number.

It is not a de Polignac number, because 4100381 - 2¹⁰ = 4099357 is a prime.

It is a super-2 number, since 2×4100381² = 33626248690322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4100311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2050190 + 2050191.

It is an arithmetic number, because the mean of its divisors is an integer number (2050191).

Almost surely, 2^4100381 is an apocalyptic number.

It is an amenable number.

4100381 is a deficient number, since it is larger than the sum of its proper divisors (1).

4100381 is an equidigital number, since it uses as much as digits as its factorization.

4100381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 4100381 is about 2024.9397521902. The cubic root of 4100381 is about 160.0570239451.

Adding to 4100381 its reverse (1830014), we get a palindrome (5930395).

The spelling of 4100381 in words is "four million, one hundred thousand, three hundred eighty-one".