1251427245 has 8 divisors (see below), whose sum is σ = 2002283616. Its totient is φ = 667427856.

The previous prime is 1251427241. The next prime is 1251427249. The reversal of 1251427245 is 5427241521.

It is an interprime number because it is at equal distance from previous prime (1251427241) and next prime (1251427249).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1251427245 - 2² = 1251427241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251427241) 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, 41714227 + ... + 41714256.

It is an arithmetic number, because the mean of its divisors is an integer number (250285452).

Almost surely, 2^1251427245 is an apocalyptic number.

1251427245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1251427245 is a deficient number, since it is larger than the sum of its proper divisors (750856371).

1251427245 is an equidigital number, since it uses as much as digits as its factorization.

1251427245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83428491.

The product of its digits is 22400, while the sum is 33.

The square root of 1251427245 is about 35375.5175933865. The cubic root of 1251427245 is about 1077.6271765594.

Adding to 1251427245 its reverse (5427241521), we get a palindrome (6678668766).

The spelling of 1251427245 in words is "one billion, two hundred fifty-one million, four hundred twenty-seven thousand, two hundred forty-five".