1300406428521 has 6 divisors (see below), whose sum is σ = 1878364841210. Its totient is φ = 866937619008.

The previous prime is 1300406428499. The next prime is 1300406428547. The reversal of 1300406428521 is 1258246040031.

It is a happy number.

1300406428521 is a `hidden beast` number, since 1 + 3 + 0 + 0 + 4 + 0 + 642 + 8 + 5 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1283317402896 + 17089025625 = 1132836^2 + 130725^2 .

It is not a de Polignac number, because 1300406428521 - 2⁷ = 1300406428393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1300406428121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72244801576 + ... + 72244801593.

Almost surely, 2^{1300406428521} is an apocalyptic number.

It is an amenable number.

1300406428521 is a deficient number, since it is larger than the sum of its proper divisors (577958412689).

1300406428521 is a wasteful number, since it uses less digits than its factorization.

1300406428521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144489603175 (or 144489603172 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 1300406428521 in words is "one trillion, three hundred billion, four hundred six million, four hundred twenty-eight thousand, five hundred twenty-one".