1381151 has 4 divisors (see below), whose sum is σ = 1385904. Its totient is φ = 1376400.

The previous prime is 1381147. The next prime is 1381153. The reversal of 1381151 is 1511831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1511831 = 379 ⋅3989.

It is a cyclic number.

It is not a de Polignac number, because 1381151 - 2² = 1381147 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381153) 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 3 ways as a sum of consecutive naturals, for example, 1910 + ... + 2531.

It is an arithmetic number, because the mean of its divisors is an integer number (346476).

2^1381151 is an apocalyptic number.

1381151 is a deficient number, since it is larger than the sum of its proper divisors (4753).

1381151 is an equidigital number, since it uses as much as digits as its factorization.

1381151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4752.

The product of its digits is 120, while the sum is 20.

The square root of 1381151 is about 1175.2238084722. The cubic root of 1381151 is about 111.3645724506.

Adding to 1381151 its reverse (1511831), we get a palindrome (2892982).

The spelling of 1381151 in words is "one million, three hundred eighty-one thousand, one hundred fifty-one".