145720346 has 8 divisors (see below), whose sum is σ = 218655444. Its totient is φ = 72835200.

The previous prime is 145720321. The next prime is 145720349. The reversal of 145720346 is 643027541.

It can be written as a sum of positive squares in 2 ways, for example, as 103327225 + 42393121 = 10165^2 + 6511^2 .

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 (145720349) 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, 4055 + ... + 17546.

Almost surely, 2^145720346 is an apocalyptic number.

145720346 is a deficient number, since it is larger than the sum of its proper divisors (72935098).

145720346 is a wasteful number, since it uses less digits than its factorization.

145720346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24976.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 145720346 is about 12071.4682619804. The cubic root of 145720346 is about 526.2273278016.

Adding to 145720346 its reverse (643027541), we get a palindrome (788747887).

The spelling of 145720346 in words is "one hundred forty-five million, seven hundred twenty thousand, three hundred forty-six".