1312150420 has 72 divisors (see below), whose sum is σ = 3215323944. Its totient is φ = 448487424.

The previous prime is 1312150387. The next prime is 1312150481. The reversal of 1312150420 is 240512131.

It can be written as a sum of positive squares in 4 ways, for example, as 13557124 + 1298593296 = 3682^2 + 36036^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 344044 + ... + 347836.

It is an arithmetic number, because the mean of its divisors is an integer number (44657277).

Almost surely, 2^1312150420 is an apocalyptic number.

1312150420 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 1312150420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1607661972).

1312150420 is an abundant number, since it is smaller than the sum of its proper divisors (1903173524).

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

1312150420 is a wasteful number, since it uses less digits than its factorization.

1312150420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4169 (or 4160 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1312150420 is about 36223.6168818079. The cubic root of 1312150420 is about 1094.7825704802.

Adding to 1312150420 its reverse (240512131), we get a palindrome (1552662551).

The spelling of 1312150420 in words is "one billion, three hundred twelve million, one hundred fifty thousand, four hundred twenty".