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1231313 is a prime number
BaseRepresentation
bin100101100100111010001
32022120001012
410230213101
5303400223
642220305
713315556
oct4544721
92276035
101231313
11771116
124b4695
133415b5
14240a2d
15194c78
hex12c9d1

1231313 has 2 divisors, whose sum is σ = 1231314. Its totient is φ = 1231312.

The previous prime is 1231309. The next prime is 1231319. The reversal of 1231313 is 3131321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1106704 + 124609 = 1052^2 + 353^2 .

It is an emirp because it is prime and its reverse (3131321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1231313 - 22 = 1231309 is a prime.

It is a super-2 number, since 2×12313132 = 3032263407938, which contains 22 as substring.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1231319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615656 + 615657.

It is an arithmetic number, because the mean of its divisors is an integer number (615657).

21231313 is an apocalyptic number.

It is an amenable number.

1231313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231313 is an equidigital number, since it uses as much as digits as its factorization.

1231313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54, while the sum is 14.

The square root of 1231313 is about 1109.6454388677. The cubic root of 1231313 is about 107.1822381373.

Adding to 1231313 its reverse (3131321), we get a palindrome (4362634).

The spelling of 1231313 in words is "one million, two hundred thirty-one thousand, three hundred thirteen".