1381590 has 128 divisors (see below), whose sum is σ = 4561920. Its totient is φ = 290304.

The previous prime is 1381559. The next prime is 1381609. The reversal of 1381590 is 951831.

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

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 32109 + ... + 32151.

It is an arithmetic number, because the mean of its divisors is an integer number (35640).

2^1381590 is an apocalyptic number.

1381590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1381590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2280960).

1381590 is an abundant number, since it is smaller than the sum of its proper divisors (3180330).

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

1381590 is a wasteful number, since it uses less digits than its factorization.

1381590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 1381590 is about 1175.4105665681. The cubic root of 1381590 is about 111.3763703082.

It can be divided in two parts, 138 and 1590, that added together give a cube (1728 = 12³).

The spelling of 1381590 in words is "one million, three hundred eighty-one thousand, five hundred ninety".