3420756 has 18 divisors (see below), whose sum is σ = 8647002. Its totient is φ = 1140240.

The previous prime is 3420751. The next prime is 3420763. The reversal of 3420756 is 6570243.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2944656 + 476100 = 1716^2 + 690^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×3420756² = 23403143223072, which contains 22 as substring.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3420751) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 47475 + ... + 47546.

It is an arithmetic number, because the mean of its divisors is an integer number (480389).

Almost surely, 2^3420756 is an apocalyptic number.

3420756 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3420756 is an abundant number, since it is smaller than the sum of its proper divisors (5226246).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3420756 is a wasteful number, since it uses less digits than its factorization.

3420756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95031 (or 95026 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 3420756 is about 1849.5285885868. The cubic root of 3420756 is about 150.6748261781.

Adding to 3420756 its reverse (6570243), we get a palindrome (9990999).

The spelling of 3420756 in words is "three million, four hundred twenty thousand, seven hundred fifty-six".