145390452601 has 3 divisors (see below), whose sum is σ = 145390833903. Its totient is φ = 145390071300.

The previous prime is 145390452593. The next prime is 145390452619. The reversal of 145390452601 is 106254093541.

The square root of 145390452601 is 381301.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 113098362601 + 32292090000 = 336301^2 + 179700^2 .

It is not a de Polignac number, because 145390452601 - 2³ = 145390452593 is a prime.

It is a super-2 number, since 2×145390452601² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145390452101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 190651 + ... + 571951.

It is an arithmetic number, because the mean of its divisors is an integer number (48463611301).

Almost surely, 2^145390452601 is an apocalyptic number.

145390452601 is the 381301-st square number.

145390452601 is the 190651-st centered octagonal number.

It is an amenable number.

145390452601 is a deficient number, since it is larger than the sum of its proper divisors (381302).

145390452601 is an frugal number, since it uses more digits than its factorization.

145390452601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762602 (or 381301 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 145390452601 in words is "one hundred forty-five billion, three hundred ninety million, four hundred fifty-two thousand, six hundred one".