1247701142919 has 24 divisors (see below), whose sum is σ = 2111138114688. Its totient is φ = 648156437040.

The previous prime is 1247701142903. The next prime is 1247701142923. The reversal of 1247701142919 is 9192411077421.

It is not a de Polignac number, because 1247701142919 - 2⁴ = 1247701142903 is a prime.

It is a super-2 number, since 2×1247701142919² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247701142929) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 385805787 + ... + 385809020.

It is an arithmetic number, because the mean of its divisors is an integer number (87964088112).

Almost surely, 2^{1247701142919} is an apocalyptic number.

1247701142919 is a deficient number, since it is larger than the sum of its proper divisors (863436971769).

1247701142919 is a wasteful number, since it uses less digits than its factorization.

1247701142919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771614835 (or 771614828 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 48.

The spelling of 1247701142919 in words is "one trillion, two hundred forty-seven billion, seven hundred one million, one hundred forty-two thousand, nine hundred nineteen".