1381725 has 48 divisors (see below), whose sum is σ = 2678400. Its totient is φ = 696960.

The previous prime is 1381697. The next prime is 1381727. The reversal of 1381725 is 5271831.

It is not a de Polignac number, because 1381725 - 2⁵ = 1381693 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

Its product of digits (1680) is a multiple of the sum of its prime divisors (120).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15481 + ... + 15569.

It is an arithmetic number, because the mean of its divisors is an integer number (55800).

2^1381725 is an apocalyptic number.

1381725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1381725 is a deficient number, since it is larger than the sum of its proper divisors (1296675).

1381725 is a wasteful number, since it uses less digits than its factorization.

1381725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131 (or 120 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 1381725 is about 1175.4679919079. The cubic root of 1381725 is about 111.3799978485.

The spelling of 1381725 in words is "one million, three hundred eighty-one thousand, seven hundred twenty-five".