3915381 has 8 divisors (see below), whose sum is σ = 5236000. Its totient is φ = 2602512.

The previous prime is 3915371. The next prime is 3915397. The reversal of 3915381 is 1835193.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3915381 - 2¹⁰ = 3914357 is a prime.

It is a super-2 number, since 2×3915381² = 30660416750322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3915341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 631 + ... + 2868.

It is an arithmetic number, because the mean of its divisors is an integer number (654500).

Almost surely, 2^3915381 is an apocalyptic number.

It is an amenable number.

3915381 is a deficient number, since it is larger than the sum of its proper divisors (1320619).

3915381 is a wasteful number, since it uses less digits than its factorization.

3915381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3875.

The product of its digits is 3240, while the sum is 30.

The square root of 3915381 is about 1978.7321698502. The cubic root of 3915381 is about 157.6127486960.

The spelling of 3915381 in words is "three million, nine hundred fifteen thousand, three hundred eighty-one".