3402561 has 4 divisors (see below), whose sum is σ = 4536752. Its totient is φ = 2268372.

The previous prime is 3402527. The next prime is 3402563. The reversal of 3402561 is 1652043.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-3402561 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3402563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 567091 + ... + 567096.

It is an arithmetic number, because the mean of its divisors is an integer number (1134188).

Almost surely, 2^3402561 is an apocalyptic number.

It is an amenable number.

3402561 is a deficient number, since it is larger than the sum of its proper divisors (1134191).

3402561 is a wasteful number, since it uses less digits than its factorization.

3402561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134190.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 3402561 is about 1844.6032093651. The cubic root of 3402561 is about 150.4072046732.

The spelling of 3402561 in words is "three million, four hundred two thousand, five hundred sixty-one".