1381960 has 16 divisors (see below), whose sum is σ = 3109500. Its totient is φ = 552768.

The previous prime is 1381921. The next prime is 1381967. The reversal of 1381960 is 691831.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1313316 + 68644 = 1146^2 + 262^2 .

It is not an unprimeable number, because it can be changed into a prime (1381967) 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, 17235 + ... + 17314.

2^1381960 is an apocalyptic number.

1381960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1381960 is an abundant number, since it is smaller than the sum of its proper divisors (1727540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1381960 is a wasteful number, since it uses less digits than its factorization.

1381960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34560 (or 34556 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1381960 is about 1175.5679478448. The cubic root of 1381960 is about 111.3863118921.

It can be divided in two parts, 138 and 1960, that multiplied together give a triangular number (270480 = T₇₃₅).

The spelling of 1381960 in words is "one million, three hundred eighty-one thousand, nine hundred sixty".