145257998 has 16 divisors (see below), whose sum is σ = 225424080. Its totient is φ = 70152000.

The previous prime is 145257991. The next prime is 145258007. The reversal of 145257998 is 899752541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145257991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 488 + ... + 17051.

It is an arithmetic number, because the mean of its divisors is an integer number (14089005).

Almost surely, 2^145257998 is an apocalyptic number.

145257998 is a deficient number, since it is larger than the sum of its proper divisors (80166082).

145257998 is a wasteful number, since it uses less digits than its factorization.

145257998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17683.

The product of its digits is 907200, while the sum is 50.

The square root of 145257998 is about 12052.3026015778. The cubic root of 145257998 is about 525.6701923211.

The spelling of 145257998 in words is "one hundred forty-five million, two hundred fifty-seven thousand, nine hundred ninety-eight".