145898 has 4 divisors (see below), whose sum is σ = 218850. Its totient is φ = 72948.

The previous prime is 145897. The next prime is 145903. The reversal of 145898 is 898541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 76729 + 69169 = 277^2 + 263^2 .

It is an alternating number because its digits alternate between odd and even.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 145898.

It is not an unprimeable number, because it can be changed into a prime (145897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36473 + ... + 36476.

2¹⁴⁵⁸⁹⁸ is an apocalyptic number.

145898 is a deficient number, since it is larger than the sum of its proper divisors (72952).

145898 is an equidigital number, since it uses as much as digits as its factorization.

145898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72951.

The product of its digits is 11520, while the sum is 35.

The square root of 145898 is about 381.9659670704. The cubic root of 145898 is about 52.6441089816.

It can be divided in two parts, 1458 and 98, that multiplied together give a square (142884 = 378²).

The spelling of 145898 in words is "one hundred forty-five thousand, eight hundred ninety-eight".