1423121329 has 8 divisors (see below), whose sum is σ = 1628114048. Its totient is φ = 1218551040.

The previous prime is 1423121317. The next prime is 1423121351. The reversal of 1423121329 is 9231213241.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1423121329 - 2²⁵ = 1389566897 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1423121297 and 1423121306.

It is not an unprimeable number, because it can be changed into a prime (1423121429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98352 + ... + 111889.

It is an arithmetic number, because the mean of its divisors is an integer number (203514256).

Almost surely, 2^1423121329 is an apocalyptic number.

It is an amenable number.

1423121329 is a deficient number, since it is larger than the sum of its proper divisors (204992719).

1423121329 is an equidigital number, since it uses as much as digits as its factorization.

1423121329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211215.

The product of its digits is 2592, while the sum is 28.

The square root of 1423121329 is about 37724.2803642429. The cubic root of 1423121329 is about 1124.8138171563.

It can be divided in two parts, 142312 and 1329, that added together give a square (143641 = 379²).

The spelling of 1423121329 in words is "one billion, four hundred twenty-three million, one hundred twenty-one thousand, three hundred twenty-nine".