145242273 has 8 divisors (see below), whose sum is σ = 211261536. Its totient is φ = 88025600.

The previous prime is 145242269. The next prime is 145242277. The reversal of 145242273 is 372242541.

It is an interprime number because it is at equal distance from previous prime (145242269) and next prime (145242277).

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

It is a cyclic number.

It is not a de Polignac number, because 145242273 - 2² = 145242269 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145242273.

It is not an unprimeable number, because it can be changed into a prime (145242277) 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, 2200608 + ... + 2200673.

It is an arithmetic number, because the mean of its divisors is an integer number (26407692).

Almost surely, 2^145242273 is an apocalyptic number.

It is an amenable number.

145242273 is a deficient number, since it is larger than the sum of its proper divisors (66019263).

145242273 is a wasteful number, since it uses less digits than its factorization.

145242273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4401295.

The product of its digits is 13440, while the sum is 30.

The square root of 145242273 is about 12051.6502189534. The cubic root of 145242273 is about 525.6512227126.

The spelling of 145242273 in words is "one hundred forty-five million, two hundred forty-two thousand, two hundred seventy-three".