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1290361 = 2395399
BaseRepresentation
bin100111011000001111001
32102120001011
410323001321
5312242421
643353521
713652662
oct4730171
92376034
101290361
11801516
125228a1
13362437
14258369
151a74e1
hex13b079

1290361 has 4 divisors (see below), whose sum is σ = 1296000. Its totient is φ = 1284724.

The previous prime is 1290329. The next prime is 1290371. The reversal of 1290361 is 1630921.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1630921 = 8112011.

It is a cyclic number.

It is not a de Polignac number, because 1290361 - 25 = 1290329 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1290371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2461 + ... + 2938.

It is an arithmetic number, because the mean of its divisors is an integer number (324000).

21290361 is an apocalyptic number.

It is an amenable number.

1290361 is a deficient number, since it is larger than the sum of its proper divisors (5639).

1290361 is an equidigital number, since it uses as much as digits as its factorization.

1290361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5638.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 1290361 is about 1135.9405794319. The cubic root of 1290361 is about 108.8688769199.

The spelling of 1290361 in words is "one million, two hundred ninety thousand, three hundred sixty-one".

Divisors: 1 239 5399 1290361