1229731 has 2 divisors, whose sum is σ = 1229732. Its totient is φ = 1229730.

The previous prime is 1229719. The next prime is 1229743. The reversal of 1229731 is 1379221.

It is a balanced prime because it is at equal distance from previous prime (1229719) and next prime (1229743).

It is a cyclic number.

It is not a de Polignac number, because 1229731 - 2¹¹ = 1227683 is a prime.

It is a super-2 number, since 2×1229731² = 3024476664722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1229696 and 1229705.

It is not a weakly prime, because it can be changed into another prime (1229131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614865 + 614866.

It is an arithmetic number, because the mean of its divisors is an integer number (614866).

2^1229731 is an apocalyptic number.

1229731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1229731 is an equidigital number, since it uses as much as digits as its factorization.

1229731 is an evil number, because the sum of its binary digits is even.

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

The square root of 1229731 is about 1108.9323694437. The cubic root of 1229731 is about 107.1363156218.

The spelling of 1229731 in words is "one million, two hundred twenty-nine thousand, seven hundred thirty-one".