1342123220 has 24 divisors (see below), whose sum is σ = 2864665608. Its totient is φ = 528048000.

The previous prime is 1342123217. The next prime is 1342123229. The reversal of 1342123220 is 223212431.

It can be written as a sum of positive squares in 4 ways, for example, as 659344 + 1341463876 = 812^2 + 36626^2 .

It is a Smith number, since the sum of its digits (20) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1342123192 and 1342123201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1342123229) 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, 548831 + ... + 551270.

It is an arithmetic number, because the mean of its divisors is an integer number (119361067).

Almost surely, 2^1342123220 is an apocalyptic number.

1342123220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1342123220 is an abundant number, since it is smaller than the sum of its proper divisors (1522542388).

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

1342123220 is a wasteful number, since it uses less digits than its factorization.

1342123220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100171 (or 1100169 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1342123220 is about 36634.9999317592. Note that the first 4 decimals coincide. The cubic root of 1342123220 is about 1103.0557513314.

Adding to 1342123220 its reverse (223212431), we get a palindrome (1565335651).

The spelling of 1342123220 in words is "one billion, three hundred forty-two million, one hundred twenty-three thousand, two hundred twenty".