1420872185081 has 4 divisors (see below), whose sum is σ = 1469867777700. Its totient is φ = 1371876592464.

The previous prime is 1420872185063. The next prime is 1420872185119. The reversal of 1420872185081 is 1805812780241.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1074728229481 + 346143955600 = 1036691^2 + 588340^2 .

It is a cyclic number.

It is not a de Polignac number, because 1420872185081 - 2¹⁸ = 1420871922937 is a prime.

It is a super-2 number, since 2×1420872185081² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1420872185981) 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, 24497796266 + ... + 24497796323.

It is an arithmetic number, because the mean of its divisors is an integer number (367466944425).

Almost surely, 2^{1420872185081} is an apocalyptic number.

It is an amenable number.

1420872185081 is a deficient number, since it is larger than the sum of its proper divisors (48995592619).

1420872185081 is an equidigital number, since it uses as much as digits as its factorization.

1420872185081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48995592618.

The product of its (nonzero) digits is 286720, while the sum is 47.

The spelling of 1420872185081 in words is "one trillion, four hundred twenty billion, eight hundred seventy-two million, one hundred eighty-five thousand, eighty-one".