1381550 has 12 divisors (see below), whose sum is σ = 2569776. Its totient is φ = 552600.

The previous prime is 1381537. The next prime is 1381553. The reversal of 1381550 is 551831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13766 + ... + 13865.

It is an arithmetic number, because the mean of its divisors is an integer number (214148).

2^1381550 is an apocalyptic number.

1381550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1381550 is a deficient number, since it is larger than the sum of its proper divisors (1188226).

1381550 is a wasteful number, since it uses less digits than its factorization.

1381550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27643 (or 27638 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1381550 is about 1175.3935511138. The cubic root of 1381550 is about 111.3752954360.

The spelling of 1381550 in words is "one million, three hundred eighty-one thousand, five hundred fifty".