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2120997 = 3706999
BaseRepresentation
bin1000000101110100100101
310222202110110
420011310211
51020332442
6113243233
724012444
oct10056445
93882413
102120997
11121959a
12863519
13593538
143d2d5b
152bd69c
hex205d25

2120997 has 4 divisors (see below), whose sum is σ = 2828000. Its totient is φ = 1413996.

The previous prime is 2120981. The next prime is 2121011. The reversal of 2120997 is 7990212.

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 not a de Polignac number, because 2120997 - 24 = 2120981 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120917) 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, 353497 + ... + 353502.

It is an arithmetic number, because the mean of its divisors is an integer number (707000).

22120997 is an apocalyptic number.

It is an amenable number.

2120997 is a deficient number, since it is larger than the sum of its proper divisors (707003).

2120997 is an equidigital number, since it uses as much as digits as its factorization.

2120997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707002.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 2120997 is about 1456.3643088184. The cubic root of 2120997 is about 128.4833006304.

The spelling of 2120997 in words is "two million, one hundred twenty thousand, nine hundred ninety-seven".

Divisors: 1 3 706999 2120997