1381235 has 4 divisors (see below), whose sum is σ = 1657488. Its totient is φ = 1104984.

The previous prime is 1381231. The next prime is 1381271. The reversal of 1381235 is 5321831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5321831 = 2111 ⋅2521.

It is a cyclic number.

It is not a de Polignac number, because 1381235 - 2² = 1381231 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1381235.

It is not an unprimeable number, because it can be changed into a prime (1381231) 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, 138119 + ... + 138128.

It is an arithmetic number, because the mean of its divisors is an integer number (414372).

2^1381235 is an apocalyptic number.

1381235 is a deficient number, since it is larger than the sum of its proper divisors (276253).

1381235 is an equidigital number, since it uses as much as digits as its factorization.

1381235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276252.

The product of its digits is 720, while the sum is 23.

The square root of 1381235 is about 1175.2595458025. The cubic root of 1381235 is about 111.3668300928.

The spelling of 1381235 in words is "one million, three hundred eighty-one thousand, two hundred thirty-five".