145909802 has 4 divisors (see below), whose sum is σ = 218864706. Its totient is φ = 72954900.

The previous prime is 145909789. The next prime is 145909837. The reversal of 145909802 is 208909541.

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., 131079601 + 14830201 = 11449^2 + 3851^2 .

It is an unprimeable number.

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, 36477449 + ... + 36477452.

Almost surely, 2^145909802 is an apocalyptic number.

145909802 is a deficient number, since it is larger than the sum of its proper divisors (72954904).

145909802 is an equidigital number, since it uses as much as digits as its factorization.

145909802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72954903.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 145909802 is about 12079.3129771523. The cubic root of 145909802 is about 526.4552844141.

The spelling of 145909802 in words is "one hundred forty-five million, nine hundred nine thousand, eight hundred two".