1381211597 has 8 divisors (see below), whose sum is σ = 1463101056. Its totient is φ = 1299393472.

The previous prime is 1381211581. The next prime is 1381211599. The reversal of 1381211597 is 7951121831.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1381211597 - 2⁴ = 1381211581 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1381211597.

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, 24998 + ... + 58200.

It is an arithmetic number, because the mean of its divisors is an integer number (182887632).

Almost surely, 2^1381211597 is an apocalyptic number.

1381211597 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1381211597 is a deficient number, since it is larger than the sum of its proper divisors (81889459).

1381211597 is a wasteful number, since it uses less digits than its factorization.

1381211597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35667.

The product of its digits is 15120, while the sum is 38.

The square root of 1381211597 is about 37164.6552116389. The cubic root of 1381211597 is about 1113.6620110675.

The spelling of 1381211597 in words is "one billion, three hundred eighty-one million, two hundred eleven thousand, five hundred ninety-seven".