1378131 has 4 divisors (see below), whose sum is σ = 1837512. Its totient is φ = 918752.

The previous prime is 1378129. The next prime is 1378141. The reversal of 1378131 is 1318731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1318731 = 3 ⋅439577.

It is a cyclic number.

It is not a de Polignac number, because 1378131 - 2¹ = 1378129 is a prime.

It is a super-2 number, since 2×1378131² = 3798490106322, which contains 22 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1378141) 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, 229686 + ... + 229691.

It is an arithmetic number, because the mean of its divisors is an integer number (459378).

2^1378131 is an apocalyptic number.

1378131 is a deficient number, since it is larger than the sum of its proper divisors (459381).

1378131 is an equidigital number, since it uses as much as digits as its factorization.

1378131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459380.

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

The square root of 1378131 is about 1173.9382436909. The cubic root of 1378131 is about 111.2833439587.

The spelling of 1378131 in words is "one million, three hundred seventy-eight thousand, one hundred thirty-one".