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1266431 is a prime number
BaseRepresentation
bin100110101001011111111
32101100012212
410311023333
5311011211
643051035
713523135
oct4651377
92340185
101266431
11795541
12510a7b
1335458a
1424d755
151a038b
hex1352ff

1266431 has 2 divisors, whose sum is σ = 1266432. Its totient is φ = 1266430.

The previous prime is 1266413. The next prime is 1266451. The reversal of 1266431 is 1346621.

It is a happy number.

Together with previous prime (1266413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1266431 - 218 = 1004287 is a prime.

It is a super-2 number, since 2×12664312 = 3207694955522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1266397 and 1266406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1266451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633215 + 633216.

It is an arithmetic number, because the mean of its divisors is an integer number (633216).

21266431 is an apocalyptic number.

1266431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266431 is an equidigital number, since it uses as much as digits as its factorization.

1266431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 23.

The square root of 1266431 is about 1125.3581652079. The cubic root of 1266431 is about 108.1916749380.

The spelling of 1266431 in words is "one million, two hundred sixty-six thousand, four hundred thirty-one".