145257242 has 16 divisors (see below), whose sum is σ = 246996960. Its totient is φ = 63513072.

The previous prime is 145257241. The next prime is 145257251. The reversal of 145257242 is 242752541.

It is a junction number, because it is equal to n+sod(n) for n = 145257199 and 145257208.

It is not an unprimeable number, because it can be changed into a prime (145257241) 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, 146528 + ... + 147515.

It is an arithmetic number, because the mean of its divisors is an integer number (15437310).

Almost surely, 2^145257242 is an apocalyptic number.

145257242 is a deficient number, since it is larger than the sum of its proper divisors (101739718).

145257242 is a wasteful number, since it uses less digits than its factorization.

145257242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294077.

The product of its digits is 22400, while the sum is 32.

The square root of 145257242 is about 12052.2712382356. The cubic root of 145257242 is about 525.6692803636.

The spelling of 145257242 in words is "one hundred forty-five million, two hundred fifty-seven thousand, two hundred forty-two".