1355336421 has 4 divisors (see below), whose sum is σ = 1807115232. Its totient is φ = 903557612.

The previous prime is 1355336419. The next prime is 1355336471. The reversal of 1355336421 is 1246335531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1355336421 - 2¹ = 1355336419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355336401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225889401 + ... + 225889406.

It is an arithmetic number, because the mean of its divisors is an integer number (451778808).

Almost surely, 2^1355336421 is an apocalyptic number.

It is an amenable number.

1355336421 is a deficient number, since it is larger than the sum of its proper divisors (451778811).

1355336421 is an equidigital number, since it uses as much as digits as its factorization.

1355336421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451778810.

The product of its digits is 32400, while the sum is 33.

The square root of 1355336421 is about 36814.8940104409. The cubic root of 1355336421 is about 1106.6637974212.

The spelling of 1355336421 in words is "one billion, three hundred fifty-five million, three hundred thirty-six thousand, four hundred twenty-one".