1312203135 has 16 divisors (see below), whose sum is σ = 2100432096. Its totient is φ = 699539328.

The previous prime is 1312203131. The next prime is 1312203143. The reversal of 1312203135 is 5313022131.

It is not a de Polignac number, because 1312203135 - 2² = 1312203131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312203131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19497 + ... + 54813.

It is an arithmetic number, because the mean of its divisors is an integer number (131277006).

Almost surely, 2^1312203135 is an apocalyptic number.

1312203135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1312203135 is a deficient number, since it is larger than the sum of its proper divisors (788228961).

1312203135 is a wasteful number, since it uses less digits than its factorization.

1312203135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37802.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 1312203135 is about 36224.3445075270. The cubic root of 1312203135 is about 1094.7972310682.

Adding to 1312203135 its reverse (5313022131), we get a palindrome (6625225266).

The spelling of 1312203135 in words is "one billion, three hundred twelve million, two hundred three thousand, one hundred thirty-five".