145312346 has 4 divisors (see below), whose sum is σ = 217968522. Its totient is φ = 72656172.

The previous prime is 145312337. The next prime is 145312373. The reversal of 145312346 is 643213541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 643213541 = 14699 ⋅43759.

It can be written as a sum of positive squares in only one way, i.e., 87628321 + 57684025 = 9361^2 + 7595^2 .

It is a super-2 number, since 2×145312346² = 42231355800047432, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36328085 + ... + 36328088.

Almost surely, 2^145312346 is an apocalyptic number.

145312346 is a deficient number, since it is larger than the sum of its proper divisors (72656176).

145312346 is an equidigital number, since it uses as much as digits as its factorization.

145312346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72656175.

The product of its digits is 8640, while the sum is 29.

The square root of 145312346 is about 12054.5570636171. The cubic root of 145312346 is about 525.7357436429.

Adding to 145312346 its reverse (643213541), we get a palindrome (788525887).

The spelling of 145312346 in words is "one hundred forty-five million, three hundred twelve thousand, three hundred forty-six".