1232155420 has 12 divisors (see below), whose sum is σ = 2587526424. Its totient is φ = 492862160.

The previous prime is 1232155417. The next prime is 1232155423. The reversal of 1232155420 is 245512321.

It is an interprime number because it is at equal distance from previous prime (1232155417) and next prime (1232155423).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1232155423) 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, 30803866 + ... + 30803905.

It is an arithmetic number, because the mean of its divisors is an integer number (215627202).

Almost surely, 2^1232155420 is an apocalyptic number.

1232155420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1232155420 is an abundant number, since it is smaller than the sum of its proper divisors (1355371004).

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

1232155420 is a wasteful number, since it uses less digits than its factorization.

1232155420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61607780 (or 61607778 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1232155420 is about 35102.0714488476. The cubic root of 1232155420 is about 1072.0667597375.

Adding to 1232155420 its reverse (245512321), we get a palindrome (1477667741).

The spelling of 1232155420 in words is "one billion, two hundred thirty-two million, one hundred fifty-five thousand, four hundred twenty".