Search a number
-
+
1380449 = 7197207
BaseRepresentation
bin101010001000001100001
32121010121202
411101001201
5323133244
645330545
714506430
oct5210141
92533552
101380449
11863174
12566a55
13394445
1427d117
151c404e
hex151061

1380449 has 4 divisors (see below), whose sum is σ = 1577664. Its totient is φ = 1183236.

The previous prime is 1380443. The next prime is 1380469. The reversal of 1380449 is 9440831.

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 a de Polignac number, because none of the positive numbers 2k-1380449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1380443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98597 + ... + 98610.

It is an arithmetic number, because the mean of its divisors is an integer number (394416).

21380449 is an apocalyptic number.

It is an amenable number.

1380449 is a deficient number, since it is larger than the sum of its proper divisors (197215).

1380449 is an equidigital number, since it uses as much as digits as its factorization.

1380449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197214.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1380449 is about 1174.9251039960. The cubic root of 1380449 is about 111.3457014319.

The spelling of 1380449 in words is "one million, three hundred eighty thousand, four hundred forty-nine".

Divisors: 1 7 197207 1380449