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2421661 = 11220151
BaseRepresentation
bin1001001111001110011101
311120000220011
421033032131
51104443121
6123523221
726404144
oct11171635
94500804
102421661
111404480
12989511
1366a348
1447075b
1532c7e1
hex24f39d

2421661 has 4 divisors (see below), whose sum is σ = 2641824. Its totient is φ = 2201500.

The previous prime is 2421659. The next prime is 2421673. The reversal of 2421661 is 1661242.

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 cyclic number.

It is not a de Polignac number, because 2421661 - 21 = 2421659 is a prime.

It is a Duffinian number.

2421661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2421641) 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 3 ways as a sum of consecutive naturals, for example, 110065 + ... + 110086.

It is an arithmetic number, because the mean of its divisors is an integer number (660456).

22421661 is an apocalyptic number.

It is an amenable number.

2421661 is a deficient number, since it is larger than the sum of its proper divisors (220163).

2421661 is a wasteful number, since it uses less digits than its factorization.

2421661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220162.

The product of its digits is 576, while the sum is 22.

The square root of 2421661 is about 1556.1686926551. The cubic root of 2421661 is about 134.2881783484.

The spelling of 2421661 in words is "two million, four hundred twenty-one thousand, six hundred sixty-one".

Divisors: 1 11 220151 2421661