1355397405 has 8 divisors (see below), whose sum is σ = 2168635872. Its totient is φ = 722878608.

The previous prime is 1355397377. The next prime is 1355397409. The reversal of 1355397405 is 5047935531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1355397405 - 2⁸ = 1355397149 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355397409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45179899 + ... + 45179928.

It is an arithmetic number, because the mean of its divisors is an integer number (271079484).

Almost surely, 2^1355397405 is an apocalyptic number.

1355397405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1355397405 is a deficient number, since it is larger than the sum of its proper divisors (813238467).

1355397405 is an equidigital number, since it uses as much as digits as its factorization.

1355397405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90359835.

The product of its (nonzero) digits is 283500, while the sum is 42.

The square root of 1355397405 is about 36815.7222528637. The cubic root of 1355397405 is about 1106.6803954584.

The spelling of 1355397405 in words is "one billion, three hundred fifty-five million, three hundred ninety-seven thousand, four hundred five".