1381137 has 4 divisors (see below), whose sum is σ = 1841520. Its totient is φ = 920756.

The previous prime is 1381111. The next prime is 1381141. The reversal of 1381137 is 7311831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7311831 = 3 ⋅2437277.

It is a cyclic number.

It is not a de Polignac number, because 1381137 - 2⁸ = 1380881 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1381147) 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, 230187 + ... + 230192.

It is an arithmetic number, because the mean of its divisors is an integer number (460380).

2^1381137 is an apocalyptic number.

It is an amenable number.

1381137 is a deficient number, since it is larger than the sum of its proper divisors (460383).

1381137 is an equidigital number, since it uses as much as digits as its factorization.

1381137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460382.

The product of its digits is 504, while the sum is 24.

The square root of 1381137 is about 1175.2178521449. The cubic root of 1381137 is about 111.3641961680.

Adding to 1381137 its reverse (7311831), we get a palindrome (8692968).

It can be divided in two parts, 138 and 1137, that added together give a triangular number (1275 = T₅₀).

The spelling of 1381137 in words is "one million, three hundred eighty-one thousand, one hundred thirty-seven".