1251355452 has 48 divisors (see below), whose sum is σ = 3027763200. Its totient is φ = 401768640.

The previous prime is 1251355379. The next prime is 1251355453. The reversal of 1251355452 is 2545531521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251355453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148677 + ... + 156867.

It is an arithmetic number, because the mean of its divisors is an integer number (63078400).

Almost surely, 2^1251355452 is an apocalyptic number.

1251355452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1251355452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1513881600).

1251355452 is an abundant number, since it is smaller than the sum of its proper divisors (1776407748).

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

1251355452 is a wasteful number, since it uses less digits than its factorization.

1251355452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8666 (or 8664 counting only the distinct ones).

The product of its digits is 30000, while the sum is 33.

The square root of 1251355452 is about 35374.5028516303. The cubic root of 1251355452 is about 1077.6065687380.

Adding to 1251355452 its reverse (2545531521), we get a palindrome (3796886973).

The spelling of 1251355452 in words is "one billion, two hundred fifty-one million, three hundred fifty-five thousand, four hundred fifty-two".