145053421 has 8 divisors (see below), whose sum is σ = 150937344. Its totient is φ = 139286160.

The previous prime is 145053413. The next prime is 145053487. The reversal of 145053421 is 124350541.

It is a happy number.

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 145053421 - 2³ = 145053413 is a prime.

It is a super-5 number, since 5×145053421⁵ (a number of 42 digits) contains 55555 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145053521) 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, 26625 + ... + 31606.

It is an arithmetic number, because the mean of its divisors is an integer number (18867168).

Almost surely, 2^145053421 is an apocalyptic number.

It is an amenable number.

145053421 is a deficient number, since it is larger than the sum of its proper divisors (5883923).

145053421 is an equidigital number, since it uses as much as digits as its factorization.

145053421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58331.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 145053421 is about 12043.8125608131. The cubic root of 145053421 is about 525.4232970099.

The spelling of 145053421 in words is "one hundred forty-five million, fifty-three thousand, four hundred twenty-one".