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1231297 = 5472251
BaseRepresentation
bin100101100100111000001
32022120000121
410230213001
5303400142
642220241
713315534
oct4544701
92276017
101231297
11771101
124b4681
133415a2
14240a1b
15194c67
hex12c9c1

1231297 has 4 divisors (see below), whose sum is σ = 1234096. Its totient is φ = 1228500.

The previous prime is 1231283. The next prime is 1231301. The reversal of 1231297 is 7921321.

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: 7921321 = 29273149.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-1231297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231207) 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, 579 + ... + 1672.

It is an arithmetic number, because the mean of its divisors is an integer number (308524).

21231297 is an apocalyptic number.

It is an amenable number.

1231297 is a deficient number, since it is larger than the sum of its proper divisors (2799).

1231297 is an equidigital number, since it uses as much as digits as its factorization.

1231297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2798.

The product of its digits is 756, while the sum is 25.

The square root of 1231297 is about 1109.6382293342. The cubic root of 1231297 is about 107.1817738840.

The spelling of 1231297 in words is "one million, two hundred thirty-one thousand, two hundred ninety-seven".

Divisors: 1 547 2251 1231297