1381211598 has 16 divisors (see below), whose sum is σ = 2974917456. Its totient is φ = 424988160.

The previous prime is 1381211581. The next prime is 1381211599. The reversal of 1381211598 is 8951121831.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381211599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8853843 + ... + 8853998.

It is an arithmetic number, because the mean of its divisors is an integer number (185932341).

Almost surely, 2^1381211598 is an apocalyptic number.

1381211598 is an abundant number, since it is smaller than the sum of its proper divisors (1593705858).

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

1381211598 is a wasteful number, since it uses less digits than its factorization.

1381211598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17707859.

The product of its digits is 17280, while the sum is 39.

The square root of 1381211598 is about 37164.6552250926. The cubic root of 1381211598 is about 1113.6620113363.

The spelling of 1381211598 in words is "one billion, three hundred eighty-one million, two hundred eleven thousand, five hundred ninety-eight".