1355231 has 4 divisors (see below), whose sum is σ = 1386792. Its totient is φ = 1323672.

The previous prime is 1355219. The next prime is 1355243. The reversal of 1355231 is 1325531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1325531 = 251 ⋅5281.

It is an interprime number because it is at equal distance from previous prime (1355219) and next prime (1355243).

It is a cyclic number.

It is not a de Polignac number, because 1355231 - 2¹⁰ = 1354207 is a prime.

It is a super-2 number, since 2×1355231² = 3673302126722, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355261) 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, 15716 + ... + 15801.

It is an arithmetic number, because the mean of its divisors is an integer number (346698).

2^1355231 is an apocalyptic number.

1355231 is a deficient number, since it is larger than the sum of its proper divisors (31561).

1355231 is an equidigital number, since it uses as much as digits as its factorization.

1355231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31560.

The product of its digits is 450, while the sum is 20.

The square root of 1355231 is about 1164.1438914498. The cubic root of 1355231 is about 110.6635103776.

The spelling of 1355231 in words is "one million, three hundred fifty-five thousand, two hundred thirty-one".