145587406 has 4 divisors (see below), whose sum is σ = 218381112. Its totient is φ = 72793702.

The previous prime is 145587391. The next prime is 145587413. The reversal of 145587406 is 604785541.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36396850 + ... + 36396853.

It is an arithmetic number, because the mean of its divisors is an integer number (54595278).

Almost surely, 2^145587406 is an apocalyptic number.

145587406 is a deficient number, since it is larger than the sum of its proper divisors (72793706).

145587406 is an equidigital number, since it uses as much as digits as its factorization.

145587406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72793705.

The product of its (nonzero) digits is 134400, while the sum is 40.

The square root of 145587406 is about 12065.9606331199. The cubic root of 145587406 is about 526.0672541917.

The spelling of 145587406 in words is "one hundred forty-five million, five hundred eighty-seven thousand, four hundred six".