145770538 has 4 divisors (see below), whose sum is σ = 218655810. Its totient is φ = 72885268.

The previous prime is 145770517. The next prime is 145770553. The reversal of 145770538 is 835077541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 835077541 = 107 ⋅7804463.

It can be written as a sum of positive squares in only one way, i.e., 74080449 + 71690089 = 8607^2 + 8467^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 145770538.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36442633 + ... + 36442636.

Almost surely, 2^145770538 is an apocalyptic number.

145770538 is a deficient number, since it is larger than the sum of its proper divisors (72885272).

145770538 is an equidigital number, since it uses as much as digits as its factorization.

145770538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72885271.

The product of its (nonzero) digits is 117600, while the sum is 40.

The square root of 145770538 is about 12073.5470347367. The cubic root of 145770538 is about 526.2877388808.

The spelling of 145770538 in words is "one hundred forty-five million, seven hundred seventy thousand, five hundred thirty-eight".