1427402542781 has 4 divisors (see below), whose sum is σ = 1427904621792. Its totient is φ = 1426900463772.

The previous prime is 1427402542763. The next prime is 1427402542789. The reversal of 1427402542781 is 1872452047241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1427402542781 is a prime.

It is a super-2 number, since 2×1427402542781² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1427402542789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251035241 + ... + 251040926.

It is an arithmetic number, because the mean of its divisors is an integer number (356976155448).

Almost surely, 2^{1427402542781} is an apocalyptic number.

It is an amenable number.

1427402542781 is a deficient number, since it is larger than the sum of its proper divisors (502079011).

1427402542781 is an equidigital number, since it uses as much as digits as its factorization.

1427402542781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502079010.

The product of its (nonzero) digits is 1003520, while the sum is 47.

The spelling of 1427402542781 in words is "one trillion, four hundred twenty-seven billion, four hundred two million, five hundred forty-two thousand, seven hundred eighty-one".