1255251320 has 32 divisors (see below), whose sum is σ = 2830111920. Its totient is φ = 501070080.

The previous prime is 1255251317. The next prime is 1255251323. The reversal of 1255251320 is 231525521.

It is an interprime number because it is at equal distance from previous prime (1255251317) and next prime (1255251323).

It is a self number, because there is not a number n which added to its sum of digits gives 1255251320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255251323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12317 + ... + 51596.

Almost surely, 2^1255251320 is an apocalyptic number.

1255251320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1255251320 is an abundant number, since it is smaller than the sum of its proper divisors (1574860600).

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

1255251320 is a wasteful number, since it uses less digits than its factorization.

1255251320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64415 (or 64411 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 1255251320 is about 35429.5261046489. The cubic root of 1255251320 is about 1078.7237209881.

Adding to 1255251320 its reverse (231525521), we get a palindrome (1486776841).

The spelling of 1255251320 in words is "one billion, two hundred fifty-five million, two hundred fifty-one thousand, three hundred twenty".