1026400255 has 4 divisors (see below), whose sum is σ = 1231680312. Its totient is φ = 821120200.

The previous prime is 1026400247. The next prime is 1026400267. The reversal of 1026400255 is 5520046201.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1026400255 - 2³ = 1026400247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102640021 + ... + 102640030.

It is an arithmetic number, because the mean of its divisors is an integer number (307920078).

Almost surely, 2^1026400255 is an apocalyptic number.

1026400255 is a deficient number, since it is larger than the sum of its proper divisors (205280057).

1026400255 is an equidigital number, since it uses as much as digits as its factorization.

1026400255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205280056.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1026400255 is about 32037.4820327691. The cubic root of 1026400255 is about 1008.7237597122.

Adding to 1026400255 its reverse (5520046201), we get a palindrome (6546446456).

The spelling of 1026400255 in words is "one billion, twenty-six million, four hundred thousand, two hundred fifty-five".