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3405581 = 7974273
BaseRepresentation
bin1100111111011100001101
320102000120122
430333130031
51332434311
6200554325
740642544
oct14773415
96360518
103405581
111a16733
1211829a5
1392314a
1464915b
154740db
hex33f70d

3405581 has 4 divisors (see below), whose sum is σ = 3410652. Its totient is φ = 3400512.

The previous prime is 3405547. The next prime is 3405601. The reversal of 3405581 is 1855043.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1276900 + 2128681 = 1130^2 + 1459^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-3405581 is a prime.

It is a super-2 number, since 2×34055812 = 23195963895122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3405581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3405781) 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, 1340 + ... + 2933.

It is an arithmetic number, because the mean of its divisors is an integer number (852663).

Almost surely, 23405581 is an apocalyptic number.

It is an amenable number.

3405581 is a deficient number, since it is larger than the sum of its proper divisors (5071).

3405581 is an equidigital number, since it uses as much as digits as its factorization.

3405581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5070.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 3405581 is about 1845.4216320397. The cubic root of 3405581 is about 150.4516903256.

The spelling of 3405581 in words is "three million, four hundred five thousand, five hundred eighty-one".

Divisors: 1 797 4273 3405581