3402781 has 8 divisors (see below), whose sum is σ = 3573504. Its totient is φ = 3234000.

The previous prime is 3402743. The next prime is 3402787. The reversal of 3402781 is 1872043.

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

It is a cyclic number.

It is not a de Polignac number, because 3402781 - 2¹⁵ = 3370013 is a prime.

It is a super-2 number, since 2×3402781² = 23157837067922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3402787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4156 + ... + 4906.

It is an arithmetic number, because the mean of its divisors is an integer number (446688).

Almost surely, 2^3402781 is an apocalyptic number.

It is an amenable number.

3402781 is a deficient number, since it is larger than the sum of its proper divisors (170723).

3402781 is a wasteful number, since it uses less digits than its factorization.

3402781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 3402781 is about 1844.6628418223. The cubic root of 3402781 is about 150.4104462385.

The spelling of 3402781 in words is "three million, four hundred two thousand, seven hundred eighty-one".