145898421 has 8 divisors (see below), whose sum is σ = 195109824. Its totient is φ = 96976320.

The previous prime is 145898413. The next prime is 145898443. The reversal of 145898421 is 124898541.

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

It is not a de Polignac number, because 145898421 - 2³ = 145898413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145898491) 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, 71145 + ... + 73166.

It is an arithmetic number, because the mean of its divisors is an integer number (24388728).

Almost surely, 2^145898421 is an apocalyptic number.

It is an amenable number.

145898421 is a deficient number, since it is larger than the sum of its proper divisors (49211403).

145898421 is a wasteful number, since it uses less digits than its factorization.

145898421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144651.

The product of its digits is 92160, while the sum is 42.

The square root of 145898421 is about 12078.8418732923. The cubic root of 145898421 is about 526.4415961781.

The spelling of 145898421 in words is "one hundred forty-five million, eight hundred ninety-eight thousand, four hundred twenty-one".