145209802 has 8 divisors (see below), whose sum is σ = 218146212. Its totient is φ = 72494400.

The previous prime is 145209791. The next prime is 145209809. The reversal of 145209802 is 208902541.

It can be written as a sum of positive squares in 2 ways, for example, as 120099681 + 25110121 = 10959^2 + 5011^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (145209809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53599 + ... + 56242.

Almost surely, 2^145209802 is an apocalyptic number.

145209802 is a deficient number, since it is larger than the sum of its proper divisors (72936410).

145209802 is a wasteful number, since it uses less digits than its factorization.

145209802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110504.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 145209802 is about 12050.3029837428. The cubic root of 145209802 is about 525.6120474949.

The spelling of 145209802 in words is "one hundred forty-five million, two hundred nine thousand, eight hundred two".