3401781 has 16 divisors (see below), whose sum is σ = 4667520. Its totient is φ = 2203200.

The previous prime is 3401777. The next prime is 3401807. The reversal of 3401781 is 1871043.

It is not a de Polignac number, because 3401781 - 2² = 3401777 is a prime.

It is a super-2 number, since 2×3401781² = 23144227943922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3401711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31155 + ... + 31263.

It is an arithmetic number, because the mean of its divisors is an integer number (291720).

Almost surely, 2^3401781 is an apocalyptic number.

It is an amenable number.

3401781 is a deficient number, since it is larger than the sum of its proper divisors (1265739).

3401781 is a wasteful number, since it uses less digits than its factorization.

3401781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 3401781 is about 1844.3917696628. The cubic root of 3401781 is about 150.3957107244.

The spelling of 3401781 in words is "three million, four hundred one thousand, seven hundred eighty-one".