153453421 has 4 divisors (see below), whose sum is σ = 167403744. Its totient is φ = 139503100.

The previous prime is 153453409. The next prime is 153453451. The reversal of 153453421 is 124354351.

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, and also an emirpimes, since its reverse is a distinct semiprime: 124354351 = 11 ⋅11304941.

It is not a de Polignac number, because 153453421 - 2²¹ = 151356269 is a prime.

It is a super-5 number, since 5×153453421⁵ (a number of 42 digits) contains 55555 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 153453421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (153453451) 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, 6975145 + ... + 6975166.

It is an arithmetic number, because the mean of its divisors is an integer number (41850936).

Almost surely, 2^153453421 is an apocalyptic number.

153453421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

153453421 is a deficient number, since it is larger than the sum of its proper divisors (13950323).

153453421 is a wasteful number, since it uses less digits than its factorization.

153453421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13950322.

The product of its digits is 7200, while the sum is 28.

The square root of 153453421 is about 12387.6317752830. The cubic root of 153453421 is about 535.3759502704.

The spelling of 153453421 in words is "one hundred fifty-three million, four hundred fifty-three thousand, four hundred twenty-one".