1255010638 has 72 divisors (see below), whose sum is σ = 2302951392. Its totient is φ = 511160832.

The previous prime is 1255010611. The next prime is 1255010689. The reversal of 1255010638 is 8360105521.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12938206 + ... + 12938302.

It is an arithmetic number, because the mean of its divisors is an integer number (31985436).

Almost surely, 2^1255010638 is an apocalyptic number.

1255010638 is a deficient number, since it is larger than the sum of its proper divisors (1047940754).

1255010638 is an equidigital number, since it uses as much as digits as its factorization.

1255010638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 1255010638 is about 35426.1293115689. The cubic root of 1255010638 is about 1078.6547717203.

The spelling of 1255010638 in words is "one billion, two hundred fifty-five million, ten thousand, six hundred thirty-eight".