145731446 has 16 divisors (see below), whose sum is σ = 264521376. Its totient is φ = 58782336.

The previous prime is 145731431. The next prime is 145731479. The reversal of 145731446 is 644137541.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305921 + ... + 306396.

It is an arithmetic number, because the mean of its divisors is an integer number (16532586).

Almost surely, 2^145731446 is an apocalyptic number.

145731446 is a deficient number, since it is larger than the sum of its proper divisors (118789930).

145731446 is a wasteful number, since it uses less digits than its factorization.

145731446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612343.

The product of its digits is 40320, while the sum is 35.

The square root of 145731446 is about 12071.9280150273. The cubic root of 145731446 is about 526.2406889535.

Adding to 145731446 its reverse (644137541), we get a palindrome (789868987).

The spelling of 145731446 in words is "one hundred forty-five million, seven hundred thirty-one thousand, four hundred forty-six".