145208621 has 8 divisors (see below), whose sum is σ = 153424800. Its totient is φ = 137049840.

The previous prime is 145208599. The next prime is 145208633. The reversal of 145208621 is 126802541.

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 145208621 - 2¹⁰ = 145207597 is a prime.

It is a super-2 number, since 2×145208621² = 42171087225443282, which contains 22 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 (145508621) 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, 9095 + ... + 19316.

It is an arithmetic number, because the mean of its divisors is an integer number (19178100).

Almost surely, 2^145208621 is an apocalyptic number.

It is an amenable number.

145208621 is a deficient number, since it is larger than the sum of its proper divisors (8216179).

145208621 is a wasteful number, since it uses less digits than its factorization.

145208621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28699.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 145208621 is about 12050.2539807259. The cubic root of 145208621 is about 525.6106225463.

The spelling of 145208621 in words is "one hundred forty-five million, two hundred eight thousand, six hundred twenty-one".