1402545172681 has 3 divisors (see below), whose sum is σ = 1402546356973. Its totient is φ = 1402543988390.

The previous prime is 1402545172673. The next prime is 1402545172709. The reversal of 1402545172681 is 1862715452041.

The square root of 1402545172681 is 1184291.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1402545172681 - 2³ = 1402545172673 is a prime.

It is a super-2 number, since 2×1402545172681² (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 (1402545170681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 592146 + ... + 1776436.

Almost surely, 2^{1402545172681} is an apocalyptic number.

1402545172681 is the 1184291-st square number.

1402545172681 is the 592146-th centered octagonal number.

It is an amenable number.

1402545172681 is a deficient number, since it is larger than the sum of its proper divisors (1184292).

1402545172681 is an frugal number, since it uses more digits than its factorization.

1402545172681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2368582 (or 1184291 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 46.

The spelling of 1402545172681 in words is "one trillion, four hundred two billion, five hundred forty-five million, one hundred seventy-two thousand, six hundred eighty-one".