1011231 has 32 divisors (see below), whose sum is σ = 1675520. Its totient is φ = 598752.

The previous prime is 1011229. The next prime is 1011233. The reversal of 1011231 is 1321101.

It is an interprime number because it is at equal distance from previous prime (1011229) and next prime (1011233).

It is not a de Polignac number, because 1011231 - 2¹ = 1011229 is a prime.

It is a super-2 number, since 2×1011231² = 2045176270722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15060 + ... + 15126.

It is an arithmetic number, because the mean of its divisors is an integer number (52360).

2^1011231 is an apocalyptic number.

1011231 is a deficient number, since it is larger than the sum of its proper divisors (664289).

1011231 is a wasteful number, since it uses less digits than its factorization.

1011231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 1011231 is about 1005.5998210024. The cubic root of 1011231 is about 100.3729738423.

Adding to 1011231 its reverse (1321101), we get a palindrome (2332332).

It can be divided in two parts, 101123 and 1, that added together give a square (101124 = 318²).

The spelling of 1011231 in words is "one million, eleven thousand, two hundred thirty-one".