145797442 has 48 divisors (see below), whose sum is σ = 267806520. Its totient is φ = 59340960.

The previous prime is 145797401. The next prime is 145797461. The reversal of 145797442 is 244797541.

It can be written as a sum of positive squares in 4 ways, for example, as 35988001 + 109809441 = 5999^2 + 10479^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2390092 + ... + 2390152.

Almost surely, 2^145797442 is an apocalyptic number.

145797442 is a deficient number, since it is larger than the sum of its proper divisors (122009078).

145797442 is an frugal number, since it uses more digits than its factorization.

145797442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164 (or 99 counting only the distinct ones).

The product of its digits is 282240, while the sum is 43.

The square root of 145797442 is about 12074.6611546660. The cubic root of 145797442 is about 526.3201148202.

Subtracting 145797442 from its reverse (244797541), we obtain a palindrome (99000099).

The spelling of 145797442 in words is "one hundred forty-five million, seven hundred ninety-seven thousand, four hundred forty-two".