1251315445 has 16 divisors (see below), whose sum is σ = 1512725760. Its totient is φ = 993643200.

The previous prime is 1251315371. The next prime is 1251315463. The reversal of 1251315445 is 5445131521.

It is not a de Polignac number, because 1251315445 - 2²³ = 1242926837 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 667860 + ... + 669730.

It is an arithmetic number, because the mean of its divisors is an integer number (94545360).

Almost surely, 2^1251315445 is an apocalyptic number.

It is an amenable number.

1251315445 is a deficient number, since it is larger than the sum of its proper divisors (261410315).

1251315445 is a wasteful number, since it uses less digits than its factorization.

1251315445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2796.

The product of its digits is 12000, while the sum is 31.

The square root of 1251315445 is about 35373.9373691988. The cubic root of 1251315445 is about 1077.5950845869.

Adding to 1251315445 its reverse (5445131521), we get a palindrome (6696446966).

The spelling of 1251315445 in words is "one billion, two hundred fifty-one million, three hundred fifteen thousand, four hundred forty-five".