1423121000 has 128 divisors (see below), whose sum is σ = 4030041600. Its totient is φ = 459187200.

The previous prime is 1423120981. The next prime is 1423121003. The reversal of 1423121000 is 1213241.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (1423121003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113021 + ... + 124979.

It is an arithmetic number, because the mean of its divisors is an integer number (31484700).

Almost surely, 2^1423121000 is an apocalyptic number.

1423121000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1423121000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2015020800).

1423121000 is an abundant number, since it is smaller than the sum of its proper divisors (2606920600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1423121000 is a wasteful number, since it uses less digits than its factorization.

1423121000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12004 (or 11990 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1423121000 is about 37724.2760036558. The cubic root of 1423121000 is about 1124.8137304774.

Adding to 1423121000 its reverse (1213241), we get a palindrome (1424334241).

The spelling of 1423121000 in words is "one billion, four hundred twenty-three million, one hundred twenty-one thousand".