1421029123 has 4 divisors (see below), whose sum is σ = 1423923768. Its totient is φ = 1418134480.

The previous prime is 1421029117. The next prime is 1421029147. The reversal of 1421029123 is 3219201241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1421029123 - 2²⁹ = 884158211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421029153) 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, 1446586 + ... + 1447567.

It is an arithmetic number, because the mean of its divisors is an integer number (355980942).

Almost surely, 2^1421029123 is an apocalyptic number.

1421029123 is a deficient number, since it is larger than the sum of its proper divisors (2894645).

1421029123 is an equidigital number, since it uses as much as digits as its factorization.

1421029123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2894644.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1421029123 is about 37696.5399340576. The cubic root of 1421029123 is about 1124.2623306996.

The spelling of 1421029123 in words is "one billion, four hundred twenty-one million, twenty-nine thousand, one hundred twenty-three".