1406387271745 has 32 divisors (see below), whose sum is σ = 1739283455520. Its totient is φ = 1091220387840.

The previous prime is 1406387271733. The next prime is 1406387271781. The reversal of 1406387271745 is 5471727836041.

It is a happy number.

It is a Cunningham number, because it is equal to 1185912²+1.

It can be written as a sum of positive squares in 16 ways, for example, as 149694705216 + 1256692566529 = 386904^2 + 1121023^2 .

It is not a de Polignac number, because 1406387271745 - 2¹¹ = 1406387269697 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 134230447 + ... + 134240923.

It is an arithmetic number, because the mean of its divisors is an integer number (54352607985).

Almost surely, 2^{1406387271745} is an apocalyptic number.

It is an amenable number.

1406387271745 is a deficient number, since it is larger than the sum of its proper divisors (332896183775).

1406387271745 is a wasteful number, since it uses less digits than its factorization.

1406387271745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16645.

The product of its (nonzero) digits is 7902720, while the sum is 55.

The spelling of 1406387271745 in words is "one trillion, four hundred six billion, three hundred eighty-seven million, two hundred seventy-one thousand, seven hundred forty-five".