1355421385 has 4 divisors (see below), whose sum is σ = 1626505668. Its totient is φ = 1084337104.

The previous prime is 1355421383. The next prime is 1355421409. The reversal of 1355421385 is 5831245531.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 223233481 + 1132187904 = 14941^2 + 33648^2 .

It is a cyclic number.

It is not a de Polignac number, because 1355421385 - 2¹ = 1355421383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1355421383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135542134 + ... + 135542143.

It is an arithmetic number, because the mean of its divisors is an integer number (406626417).

Almost surely, 2^1355421385 is an apocalyptic number.

It is an amenable number.

1355421385 is a deficient number, since it is larger than the sum of its proper divisors (271084283).

1355421385 is an equidigital number, since it uses as much as digits as its factorization.

1355421385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271084282.

The product of its digits is 72000, while the sum is 37.

The square root of 1355421385 is about 36816.0479275003. The cubic root of 1355421385 is about 1106.6869219672.

It can be divided in two parts, 1355 and 421385, that added together give a triangular number (422740 = T₉₁₉).

The spelling of 1355421385 in words is "one billion, three hundred fifty-five million, four hundred twenty-one thousand, three hundred eighty-five".