1229601 has 4 divisors (see below), whose sum is σ = 1639472. Its totient is φ = 819732.

The previous prime is 1229597. The next prime is 1229617. The reversal of 1229601 is 1069221.

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.

It is not a de Polignac number, because 1229601 - 2² = 1229597 is a prime.

It is a D-number.

It is a Duffinian number.

1229601 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1229201) 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, 204931 + ... + 204936.

It is an arithmetic number, because the mean of its divisors is an integer number (409868).

2^1229601 is an apocalyptic number.

It is an amenable number.

1229601 is a deficient number, since it is larger than the sum of its proper divisors (409871).

1229601 is an equidigital number, since it uses as much as digits as its factorization.

1229601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409870.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 1229601 is about 1108.8737529584. The cubic root of 1229601 is about 107.1325402130.

It can be divided in two parts, 1229 and 601, that added together give a triangular number (1830 = T₆₀).

The spelling of 1229601 in words is "one million, two hundred twenty-nine thousand, six hundred one".