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2120691 = 3706897
BaseRepresentation
bin1000000101101111110011
310222202001010
420011233303
51020330231
6113242003
724011526
oct10055763
93882033
102120691
111219341
12863303
13593361
143d2bbd
152bd546
hex205bf3

2120691 has 4 divisors (see below), whose sum is σ = 2827592. Its totient is φ = 1413792.

The previous prime is 2120653. The next prime is 2120693. The reversal of 2120691 is 1960212.

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

It is not a de Polignac number, because 2120691 - 211 = 2118643 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 (2120693) 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, 353446 + ... + 353451.

It is an arithmetic number, because the mean of its divisors is an integer number (706898).

22120691 is an apocalyptic number.

2120691 is a deficient number, since it is larger than the sum of its proper divisors (706901).

2120691 is an equidigital number, since it uses as much as digits as its factorization.

2120691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706900.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 2120691 is about 1456.2592488977. The cubic root of 2120691 is about 128.4771214953.

The spelling of 2120691 in words is "two million, one hundred twenty thousand, six hundred ninety-one".

Divisors: 1 3 706897 2120691