145231906 has 8 divisors (see below), whose sum is σ = 220472784. Its totient is φ = 71740980.

The previous prime is 145231873. The next prime is 145231907. The reversal of 145231906 is 609132541.

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 (145231907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 437280 + ... + 437611.

It is an arithmetic number, because the mean of its divisors is an integer number (27559098).

Almost surely, 2^145231906 is an apocalyptic number.

145231906 is a deficient number, since it is larger than the sum of its proper divisors (75240878).

145231906 is an equidigital number, since it uses as much as digits as its factorization.

145231906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874976.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 145231906 is about 12051.2201042052. The cubic root of 145231906 is about 525.6387158949.

The spelling of 145231906 in words is "one hundred forty-five million, two hundred thirty-one thousand, nine hundred six".