145902242 has 8 divisors (see below), whose sum is σ = 219481500. Its totient is φ = 72741744.

The previous prime is 145902233. The next prime is 145902247. The reversal of 145902242 is 242209541.

It is a Cunningham number, because it is equal to 12079²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 145902241 + 1 = 12079^2 + 1^2 .

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

It is a zygodrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (145902247) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 103817 + ... + 105212.

Almost surely, 2^145902242 is an apocalyptic number.

145902242 is a deficient number, since it is larger than the sum of its proper divisors (73579258).

145902242 is a wasteful number, since it uses less digits than its factorization.

145902242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209380.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 145902242 is about 12079.0000413942. Note that the first 4 decimals coincide. The cubic root of 145902242 is about 526.4461918774.

The spelling of 145902242 in words is "one hundred forty-five million, nine hundred two thousand, two hundred forty-two".