145215398 has 16 divisors (see below), whose sum is σ = 222236784. Its totient is φ = 71148000.

The previous prime is 145215391. The next prime is 145215401. The reversal of 145215398 is 893512541.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145215391) 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, 23648 + ... + 29148.

It is an arithmetic number, because the mean of its divisors is an integer number (13889799).

Almost surely, 2^145215398 is an apocalyptic number.

145215398 is a deficient number, since it is larger than the sum of its proper divisors (77021386).

145215398 is a wasteful number, since it uses less digits than its factorization.

145215398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5767.

The product of its digits is 43200, while the sum is 38.

The square root of 145215398 is about 12050.5351748377. The cubic root of 145215398 is about 525.6187993055.

The spelling of 145215398 in words is "one hundred forty-five million, two hundred fifteen thousand, three hundred ninety-eight".