145420554 has 8 divisors (see below), whose sum is σ = 290841120. Its totient is φ = 48473516.

The previous prime is 145420553. The next prime is 145420589. The reversal of 145420554 is 455024541.

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

145420554 is an admirable number.

It is a super-2 number, since 2×145420554² = 42294275051333832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145420553) 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, 12118374 + ... + 12118385.

It is an arithmetic number, because the mean of its divisors is an integer number (36355140).

Almost surely, 2^145420554 is an apocalyptic number.

145420554 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145420554 is a wasteful number, since it uses less digits than its factorization.

145420554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24236764.

The product of its (nonzero) digits is 16000, while the sum is 30.

The square root of 145420554 is about 12059.0444895108. The cubic root of 145420554 is about 525.8662090389.

The spelling of 145420554 in words is "one hundred forty-five million, four hundred twenty thousand, five hundred fifty-four".