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1321231 = 4872713
BaseRepresentation
bin101000010100100001111
32111010101111
411002210033
5314234411
644152451
714141662
oct5024417
92433344
101321231
1182272a
12538727
133734c2
142656d9
151b1721
hex14290f

1321231 has 4 divisors (see below), whose sum is σ = 1324432. Its totient is φ = 1318032.

The previous prime is 1321219. The next prime is 1321247.

1321231 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 1321231 - 217 = 1190159 is a prime.

It is a super-2 number, since 2×13212312 = 3491302710722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321031) 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, 870 + ... + 1843.

It is an arithmetic number, because the mean of its divisors is an integer number (331108).

21321231 is an apocalyptic number.

1321231 is a deficient number, since it is larger than the sum of its proper divisors (3201).

1321231 is an equidigital number, since it uses as much as digits as its factorization.

1321231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3200.

The product of its digits is 36, while the sum is 13.

The square root of 1321231 is about 1149.4481284512. The cubic root of 1321231 is about 109.7302204380.

The spelling of 1321231 in words is "one million, three hundred twenty-one thousand, two hundred thirty-one".

Divisors: 1 487 2713 1321231