145372520242 has 4 divisors (see below), whose sum is σ = 218058780366. Its totient is φ = 72686260120.

The previous prime is 145372520219. The next prime is 145372520261. The reversal of 145372520242 is 242025273541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242025273541 = 145391 ⋅1664651.

It can be written as a sum of positive squares in only one way, i.e., 103059618841 + 42312901401 = 321029^2 + 205701^2 .

It is a super-2 number, since 2×145372520242² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36343130059 + ... + 36343130062.

Almost surely, 2^145372520242 is an apocalyptic number.

145372520242 is a deficient number, since it is larger than the sum of its proper divisors (72686260124).

145372520242 is an equidigital number, since it uses as much as digits as its factorization.

145372520242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72686260123.

The product of its (nonzero) digits is 134400, while the sum is 37.

Adding to 145372520242 its reverse (242025273541), we get a palindrome (387397793783).

The spelling of 145372520242 in words is "one hundred forty-five billion, three hundred seventy-two million, five hundred twenty thousand, two hundred forty-two".