1381235000 has 40 divisors (see below), whose sum is σ = 3236245320. Its totient is φ = 552492000.

The previous prime is 1381234993. The next prime is 1381235003. The reversal of 1381235000 is 5321831.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381235003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 133124 + ... + 143123.

It is an arithmetic number, because the mean of its divisors is an integer number (80906133).

Almost surely, 2^1381235000 is an apocalyptic number.

1381235000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1381235000 is an abundant number, since it is smaller than the sum of its proper divisors (1855010320).

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

1381235000 is an equidigital number, since it uses as much as digits as its factorization.

1381235000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276273 (or 276254 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1381235000 is about 37164.9700659102. The cubic root of 1381235000 is about 1113.6683009280.

Adding to 1381235000 its reverse (5321831), we get a palindrome (1386556831).

The spelling of 1381235000 in words is "one billion, three hundred eighty-one million, two hundred thirty-five thousand".