145641442 has 8 divisors (see below), whose sum is σ = 219275100. Its totient is φ = 72549744.

The previous prime is 145641437. The next prime is 145641443. The reversal of 145641442 is 244146541.

It can be written as a sum of positive squares in 2 ways, for example, as 144937521 + 703921 = 12039^2 + 839^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×145641442² = 42422859255678728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145641443) 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, 134817 + ... + 135892.

Almost surely, 2^145641442 is an apocalyptic number.

145641442 is a deficient number, since it is larger than the sum of its proper divisors (73633658).

145641442 is a wasteful number, since it uses less digits than its factorization.

145641442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270980.

The product of its digits is 15360, while the sum is 31.

The square root of 145641442 is about 12068.1996171757. The cubic root of 145641442 is about 526.1323309148.

Adding to 145641442 its reverse (244146541), we get a palindrome (389787983).

The spelling of 145641442 in words is "one hundred forty-five million, six hundred forty-one thousand, four hundred forty-two".