1371430708561 has 9 divisors (see below), whose sum is σ = 1385829714321. Its totient is φ = 1357179823872.

The previous prime is 1371430708547. The next prime is 1371430708577. The reversal of 1371430708561 is 1658070341731.

The square root of 1371430708561 is 1171081.

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

It can be written as a sum of positive squares in 4 ways, for example, as 562078578961 + 809352129600 = 749719^2 + 899640^2 .

It is not a de Polignac number, because 1371430708561 - 2²⁷ = 1371296490833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1371430708061) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 113588821 + ... + 113600893.

It is an arithmetic number, because the mean of its divisors is an integer number (153981079369).

Almost surely, 2^{1371430708561} is an apocalyptic number.

1371430708561 is the 1171081-st square number.

1371430708561 is the 585541-st centered octagonal number.

It is an amenable number.

1371430708561 is a deficient number, since it is larger than the sum of its proper divisors (14399005760).

1371430708561 is an frugal number, since it uses more digits than its factorization.

1371430708561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24340 (or 12170 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 46.

The spelling of 1371430708561 in words is "one trillion, three hundred seventy-one billion, four hundred thirty million, seven hundred eight thousand, five hundred sixty-one".