1002400255 has 32 divisors (see below), whose sum is σ = 1253180160. Its totient is φ = 769267200.

The previous prime is 1002400253. The next prime is 1002400277. The reversal of 1002400255 is 5520042001.

1002400255 = T₄₈₅ + T₄₈₆ + ... + T₁₈₂₉.

It is not a de Polignac number, because 1002400255 - 2¹ = 1002400253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002400253) 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, 3726261 + ... + 3726529.

It is an arithmetic number, because the mean of its divisors is an integer number (39161880).

Almost surely, 2^1002400255 is an apocalyptic number.

1002400255 is a deficient number, since it is larger than the sum of its proper divisors (250779905).

1002400255 is a wasteful number, since it uses less digits than its factorization.

1002400255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 1002400255 is about 31660.7052195620. The cubic root of 1002400255 is about 1000.7994457162.

Adding to 1002400255 its reverse (5520042001), we get a palindrome (6522442256).

The spelling of 1002400255 in words is "one billion, two million, four hundred thousand, two hundred fifty-five".