1248194918421 has 16 divisors (see below), whose sum is σ = 2017284717120. Its totient is φ = 756481768560.

The previous prime is 1248194918387. The next prime is 1248194918491.

1248194918421 is a `hidden beast` number, since 1 + 2 + 48 + 1 + 94 + 91 + 8 + 421 = 666.

1248194918421 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1248194918421 - 2¹¹ = 1248194916373 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1248194918491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2101337950 + ... + 2101338543.

It is an arithmetic number, because the mean of its divisors is an integer number (126080294820).

Almost surely, 2^{1248194918421} is an apocalyptic number.

1248194918421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1248194918421 is a deficient number, since it is larger than the sum of its proper divisors (769089798699).

1248194918421 is a wasteful number, since it uses less digits than its factorization.

1248194918421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4202676513 (or 4202676507 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 54.

The spelling of 1248194918421 in words is "one trillion, two hundred forty-eight billion, one hundred ninety-four million, nine hundred eighteen thousand, four hundred twenty-one".