145885898 has 4 divisors (see below), whose sum is σ = 218828850. Its totient is φ = 72942948.

The previous prime is 145885897. The next prime is 145885919. The reversal of 145885898 is 898588541.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 898588541 = 23 ⋅39069067.

It can be written as a sum of positive squares in only one way, i.e., 87928129 + 57957769 = 9377^2 + 7613^2 .

It is not an unprimeable number, because it can be changed into a prime (145885897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36471473 + ... + 36471476.

Almost surely, 2^145885898 is an apocalyptic number.

145885898 is a deficient number, since it is larger than the sum of its proper divisors (72942952).

145885898 is an equidigital number, since it uses as much as digits as its factorization.

145885898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72942951.

The product of its digits is 3686400, while the sum is 56.

The square root of 145885898 is about 12078.3234763770. The cubic root of 145885898 is about 526.4265336054.

The spelling of 145885898 in words is "one hundred forty-five million, eight hundred eighty-five thousand, eight hundred ninety-eight".