1229655 has 32 divisors (see below), whose sum is σ = 2304000. Its totient is φ = 559776.

The previous prime is 1229647. The next prime is 1229663. The reversal of 1229655 is 5569221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1229647) and next prime (1229663).

It is not a de Polignac number, because 1229655 - 2³ = 1229647 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5026 + ... + 5264.

It is an arithmetic number, because the mean of its divisors is an integer number (72000).

2^1229655 is an apocalyptic number.

1229655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1229655 is a deficient number, since it is larger than the sum of its proper divisors (1074345).

1229655 is an equidigital number, since it uses as much as digits as its factorization.

1229655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268 (or 254 counting only the distinct ones).

The product of its digits is 5400, while the sum is 30.

The square root of 1229655 is about 1108.8981017208. The cubic root of 1229655 is about 107.1341084920.

The spelling of 1229655 in words is "one million, two hundred twenty-nine thousand, six hundred fifty-five".