1381471601 has 4 divisors (see below), whose sum is σ = 1381551600. Its totient is φ = 1381391604.

The previous prime is 1381471573. The next prime is 1381471603. The reversal of 1381471601 is 1061741831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1381471601 - 2⁶ = 1381471537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1381471603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2171 + ... + 52608.

It is an arithmetic number, because the mean of its divisors is an integer number (345387900).

Almost surely, 2^1381471601 is an apocalyptic number.

It is an amenable number.

1381471601 is a deficient number, since it is larger than the sum of its proper divisors (79999).

1381471601 is an equidigital number, since it uses as much as digits as its factorization.

1381471601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79998.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 1381471601 is about 37168.1530480060. The cubic root of 1381471601 is about 1113.7318865331.

The spelling of 1381471601 in words is "one billion, three hundred eighty-one million, four hundred seventy-one thousand, six hundred one".