1245505250551 has 8 divisors (see below), whose sum is σ = 1269025833600. Its totient is φ = 1221985426272.

The previous prime is 1245505250543. The next prime is 1245505250573. The reversal of 1245505250551 is 1550525055421.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1245505250551 - 2³ = 1245505250543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245505250501) 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, 3982425 + ... + 4283773.

It is an arithmetic number, because the mean of its divisors is an integer number (158628229200).

Almost surely, 2^{1245505250551} is an apocalyptic number.

1245505250551 is a deficient number, since it is larger than the sum of its proper divisors (23520583049).

1245505250551 is an equidigital number, since it uses as much as digits as its factorization.

1245505250551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379385.

The product of its (nonzero) digits is 250000, while the sum is 40.

The spelling of 1245505250551 in words is "one trillion, two hundred forty-five billion, five hundred five million, two hundred fifty thousand, five hundred fifty-one".