145172453 has 2 divisors, whose sum is σ = 145172454. Its totient is φ = 145172452.

The previous prime is 145172393. The next prime is 145172501. The reversal of 145172453 is 354271541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126180289 + 18992164 = 11233^2 + 4358^2 .

It is a cyclic number.

It is not a de Polignac number, because 145172453 - 2¹⁸ = 144910309 is a prime.

It is a super-2 number, since 2×145172453² = 42150082220074418, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145177453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72586226 + 72586227.

It is an arithmetic number, because the mean of its divisors is an integer number (72586227).

Almost surely, 2^145172453 is an apocalyptic number.

It is an amenable number.

145172453 is a deficient number, since it is larger than the sum of its proper divisors (1).

145172453 is an equidigital number, since it uses as much as digits as its factorization.

145172453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16800, while the sum is 32.

The square root of 145172453 is about 12048.7531720091. The cubic root of 145172453 is about 525.5669799044.

The spelling of 145172453 in words is "one hundred forty-five million, one hundred seventy-two thousand, four hundred fifty-three".