1255201240 has 16 divisors (see below), whose sum is σ = 2824202880. Its totient is φ = 502080480.

The previous prime is 1255201193. The next prime is 1255201247. The reversal of 1255201240 is 421025521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255201247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15689976 + ... + 15690055.

It is an arithmetic number, because the mean of its divisors is an integer number (176512680).

Almost surely, 2^1255201240 is an apocalyptic number.

1255201240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1255201240 is an abundant number, since it is smaller than the sum of its proper divisors (1569001640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1255201240 is a wasteful number, since it uses less digits than its factorization.

1255201240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31380042 (or 31380038 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 1255201240 is about 35428.8193424506. The cubic root of 1255201240 is about 1078.7093750688.

Adding to 1255201240 its reverse (421025521), we get a palindrome (1676226761).

The spelling of 1255201240 in words is "one billion, two hundred fifty-five million, two hundred one thousand, two hundred forty".