1381211601 has 16 divisors (see below), whose sum is σ = 2296040448. Its totient is φ = 717512400.

The previous prime is 1381211599. The next prime is 1381211609. The reversal of 1381211601 is 1061121831.

It is not a de Polignac number, because 1381211601 - 2¹ = 1381211599 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1381211609) 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, 2989405 + ... + 2989866.

It is an arithmetic number, because the mean of its divisors is an integer number (143502528).

Almost surely, 2^1381211601 is an apocalyptic number.

1381211601 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1381211601 is a deficient number, since it is larger than the sum of its proper divisors (914828847).

1381211601 is a wasteful number, since it uses less digits than its factorization.

1381211601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5979292.

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 1381211601 is about 37164.6552654535. The cubic root of 1381211601 is about 1113.6620121426.

The spelling of 1381211601 in words is "one billion, three hundred eighty-one million, two hundred eleven thousand, six hundred one".