155335421 has 8 divisors (see below), whose sum is σ = 158941440. Its totient is φ = 151754512.

The previous prime is 155335403. The next prime is 155335447. The reversal of 155335421 is 124533551.

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

It is a cyclic number.

It is not a de Polignac number, because 155335421 - 2²² = 151141117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155332421) 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, 6536 + ... + 18798.

It is an arithmetic number, because the mean of its divisors is an integer number (19867680).

Almost surely, 2^155335421 is an apocalyptic number.

It is an amenable number.

155335421 is a deficient number, since it is larger than the sum of its proper divisors (3606019).

155335421 is a wasteful number, since it uses less digits than its factorization.

155335421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12555.

The product of its digits is 9000, while the sum is 29.

The square root of 155335421 is about 12463.3631496479. The cubic root of 155335421 is about 537.5557350533. Note that the first 3 decimals are identical.

Adding to 155335421 its reverse (124533551), we get a palindrome (279868972).

The spelling of 155335421 in words is "one hundred fifty-five million, three hundred thirty-five thousand, four hundred twenty-one".