1251325420 has 12 divisors (see below), whose sum is σ = 2627783424. Its totient is φ = 500530160.

The previous prime is 1251325417. The next prime is 1251325423. The reversal of 1251325420 is 245231521.

It is an interprime number because it is at equal distance from previous prime (1251325417) and next prime (1251325423).

It is not an unprimeable number, because it can be changed into a prime (1251325423) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 31283116 + ... + 31283155.

It is an arithmetic number, because the mean of its divisors is an integer number (218981952).

Almost surely, 2^1251325420 is an apocalyptic number.

1251325420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1251325420 is an abundant number, since it is smaller than the sum of its proper divisors (1376458004).

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

1251325420 is a wasteful number, since it uses less digits than its factorization.

1251325420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62566280 (or 62566278 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1251325420 is about 35374.0783625524. The cubic root of 1251325420 is about 1077.5979479689.

Adding to 1251325420 its reverse (245231521), we get a palindrome (1496556941).

The spelling of 1251325420 in words is "one billion, two hundred fifty-one million, three hundred twenty-five thousand, four hundred twenty".