1251230426365 has 8 divisors (see below), whose sum is σ = 1501499248128. Its totient is φ = 1000969183440.

The previous prime is 1251230426317. The next prime is 1251230426377. The reversal of 1251230426365 is 5636240321521.

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

It is not a de Polignac number, because 1251230426365 - 2⁹ = 1251230425853 is a prime.

It is a super-2 number, since 2×1251230426365² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1524937 + ... + 2197246.

It is an arithmetic number, because the mean of its divisors is an integer number (187687406016).

Almost surely, 2^{1251230426365} is an apocalyptic number.

It is an amenable number.

1251230426365 is a deficient number, since it is larger than the sum of its proper divisors (250268821763).

1251230426365 is an equidigital number, since it uses as much as digits as its factorization.

1251230426365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3789419.

The product of its (nonzero) digits is 259200, while the sum is 40.

Adding to 1251230426365 its reverse (5636240321521), we get a palindrome (6887470747886).

The spelling of 1251230426365 in words is "one trillion, two hundred fifty-one billion, two hundred thirty million, four hundred twenty-six thousand, three hundred sixty-five".