145145554 has 8 divisors (see below), whose sum is σ = 222781680. Its totient is φ = 70884996.

The previous prime is 145145543. The next prime is 145145557. The reversal of 145145554 is 455541541.

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

It is not an unprimeable number, because it can be changed into a prime (145145557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 843784 + ... + 843955.

It is an arithmetic number, because the mean of its divisors is an integer number (27847710).

Almost surely, 2^145145554 is an apocalyptic number.

145145554 is a deficient number, since it is larger than the sum of its proper divisors (77636126).

145145554 is a wasteful number, since it uses less digits than its factorization.

145145554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1687784.

The product of its digits is 40000, while the sum is 34.

The square root of 145145554 is about 12047.6368637173. The cubic root of 145145554 is about 525.5345171353.

The spelling of 145145554 in words is "one hundred forty-five million, one hundred forty-five thousand, five hundred fifty-four".