1245420025051 has 4 divisors (see below), whose sum is σ = 1245839502600. Its totient is φ = 1245000547504.

The previous prime is 1245420024991. The next prime is 1245420025099. The reversal of 1245420025051 is 1505200245421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1245420025051 - 2¹³ = 1245420016859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1245420026051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209734321 + ... + 209740258.

It is an arithmetic number, because the mean of its divisors is an integer number (311459875650).

Almost surely, 2^{1245420025051} is an apocalyptic number.

1245420025051 is a deficient number, since it is larger than the sum of its proper divisors (419477549).

1245420025051 is an equidigital number, since it uses as much as digits as its factorization.

1245420025051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419477548.

The product of its (nonzero) digits is 16000, while the sum is 31.

The spelling of 1245420025051 in words is "one trillion, two hundred forty-five billion, four hundred twenty million, twenty-five thousand, fifty-one".