145405506 has 16 divisors (see below), whose sum is σ = 291373344. Its totient is φ = 48374784.

The previous prime is 145405501. The next prime is 145405541. The reversal of 145405506 is 605504541.

It is a super-2 number, since 2×145405506² = 42285522350232072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145405501) 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, 20031 + ... + 26306.

It is an arithmetic number, because the mean of its divisors is an integer number (18210834).

Almost surely, 2^145405506 is an apocalyptic number.

145405506 is an abundant number, since it is smaller than the sum of its proper divisors (145967838).

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

145405506 is a wasteful number, since it uses less digits than its factorization.

145405506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46865.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 145405506 is about 12058.4205433382. The cubic root of 145405506 is about 525.8480696781.

The spelling of 145405506 in words is "one hundred forty-five million, four hundred five thousand, five hundred six".