1255012400255 has 4 divisors (see below), whose sum is σ = 1506014880312. Its totient is φ = 1004009920200.

The previous prime is 1255012400233. The next prime is 1255012400267. The reversal of 1255012400255 is 5520042105521.

It is a happy number.

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

It is not a de Polignac number, because 1255012400255 - 2¹⁸ = 1255012138111 is a prime.

It is a super-2 number, since 2×1255012400255² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125501240021 + ... + 125501240030.

It is an arithmetic number, because the mean of its divisors is an integer number (376503720078).

Almost surely, 2^{1255012400255} is an apocalyptic number.

1255012400255 is a deficient number, since it is larger than the sum of its proper divisors (251002480057).

1255012400255 is an equidigital number, since it uses as much as digits as its factorization.

1255012400255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251002480056.

The product of its (nonzero) digits is 20000, while the sum is 32.

Adding to 1255012400255 its reverse (5520042105521), we get a palindrome (6775054505776).

The spelling of 1255012400255 in words is "one trillion, two hundred fifty-five billion, twelve million, four hundred thousand, two hundred fifty-five".