1381672485 has 24 divisors (see below), whose sum is σ = 2483601120. Its totient is φ = 736891344.

The previous prime is 1381672483. The next prime is 1381672507. The reversal of 1381672485 is 5842761831.

1381672485 is a `hidden beast` number, since 1 + 3 + 8 + 167 + 2 + 485 = 666.

It is not a de Polignac number, because 1381672485 - 2¹ = 1381672483 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1381672485.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381672483) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 567375 + ... + 569804.

It is an arithmetic number, because the mean of its divisors is an integer number (103483380).

Almost surely, 2^1381672485 is an apocalyptic number.

1381672485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1381672485 is a deficient number, since it is larger than the sum of its proper divisors (1101928635).

1381672485 is an equidigital number, since it uses as much as digits as its factorization.

1381672485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137199 (or 1137187 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 1381672485 is about 37170.8553170357. The cubic root of 1381672485 is about 1113.7858676338.

The spelling of 1381672485 in words is "one billion, three hundred eighty-one million, six hundred seventy-two thousand, four hundred eighty-five".