1385142641 has 2 divisors, whose sum is σ = 1385142642. Its totient is φ = 1385142640.

The previous prime is 1385142623. The next prime is 1385142667. The reversal of 1385142641 is 1462415831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1383542416 + 1600225 = 37196^2 + 1265^2 .

It is a cyclic number.

It is not a de Polignac number, because 1385142641 - 2¹⁰ = 1385141617 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1385142611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 692571320 + 692571321.

It is an arithmetic number, because the mean of its divisors is an integer number (692571321).

Almost surely, 2^1385142641 is an apocalyptic number.

It is an amenable number.

1385142641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1385142641 is an equidigital number, since it uses as much as digits as its factorization.

1385142641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 35.

The square root of 1385142641 is about 37217.5044972121. The cubic root of 1385142641 is about 1114.7175354790.

The spelling of 1385142641 in words is "one billion, three hundred eighty-five million, one hundred forty-two thousand, six hundred forty-one".