1023261255 has 20 divisors (see below), whose sum is σ = 1834291272. Its totient is φ = 545739120.

The previous prime is 1023261241. The next prime is 1023261257. The reversal of 1023261255 is 5521623201.

It is a happy number.

1023261255 is a `hidden beast` number, since 10 + 2 + 32 + 612 + 5 + 5 = 666.

It is not a de Polignac number, because 1023261255 - 2²⁷ = 889043527 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023261257) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1262881 + ... + 1263690.

Almost surely, 2^1023261255 is an apocalyptic number.

1023261255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1023261255 is a deficient number, since it is larger than the sum of its proper divisors (811030017).

1023261255 is an equidigital number, since it uses as much as digits as its factorization.

1023261255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2526588 (or 2526579 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 1023261255 is about 31988.4550267749. The cubic root of 1023261255 is about 1007.6943960898.

Adding to 1023261255 its reverse (5521623201), we get a palindrome (6544884456).

The spelling of 1023261255 in words is "one billion, twenty-three million, two hundred sixty-one thousand, two hundred fifty-five".