1201323420 has 96 divisors (see below), whose sum is σ = 4077239040. Its totient is φ = 291228480.

The previous prime is 1201323407. The next prime is 1201323433. The reversal of 1201323420 is 243231021.

It is an interprime number because it is at equal distance from previous prime (1201323407) and next prime (1201323433).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1201323393 and 1201323402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95182 + ... + 107061.

It is an arithmetic number, because the mean of its divisors is an integer number (42471240).

Almost surely, 2^1201323420 is an apocalyptic number.

1201323420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201323420 is an abundant number, since it is smaller than the sum of its proper divisors (2875915620).

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

1201323420 is a wasteful number, since it uses less digits than its factorization.

1201323420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202272 (or 202264 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1201323420 is about 34660.1128099722. The cubic root of 1201323420 is about 1063.0490766617.

Adding to 1201323420 its reverse (243231021), we get a palindrome (1444554441).

The spelling of 1201323420 in words is "one billion, two hundred one million, three hundred twenty-three thousand, four hundred twenty".