1231455 has 16 divisors (see below), whose sum is σ = 2008800. Its totient is φ = 643968.

The previous prime is 1231453. The next prime is 1231457. The reversal of 1231455 is 5541321.

It is an interprime number because it is at equal distance from previous prime (1231453) and next prime (1231457).

It is not a de Polignac number, because 1231455 - 2¹ = 1231453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21 + ... + 1569.

It is an arithmetic number, because the mean of its divisors is an integer number (125550).

2^1231455 is an apocalyptic number.

1231455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1231455 is a deficient number, since it is larger than the sum of its proper divisors (777345).

1231455 is a wasteful number, since it uses less digits than its factorization.

1231455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1610.

The product of its digits is 600, while the sum is 21.

The square root of 1231455 is about 1109.7094214253. The cubic root of 1231455 is about 107.1863582088.

Adding to 1231455 its reverse (5541321), we get a palindrome (6772776).

The spelling of 1231455 in words is "one million, two hundred thirty-one thousand, four hundred fifty-five".