145552457 has 2 divisors, whose sum is σ = 145552458. Its totient is φ = 145552456.

The previous prime is 145552447. The next prime is 145552481. The reversal of 145552457 is 754255541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86508601 + 59043856 = 9301^2 + 7684^2 .

It is a cyclic number.

It is not a de Polignac number, because 145552457 - 2¹⁴ = 145536073 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145552457.

It is not a weakly prime, because it can be changed into another prime (145552427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72776228 + 72776229.

It is an arithmetic number, because the mean of its divisors is an integer number (72776229).

Almost surely, 2^145552457 is an apocalyptic number.

It is an amenable number.

145552457 is a deficient number, since it is larger than the sum of its proper divisors (1).

145552457 is an equidigital number, since it uses as much as digits as its factorization.

145552457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 140000, while the sum is 38.

The square root of 145552457 is about 12064.5122984727. The cubic root of 145552457 is about 526.0251557796.

The spelling of 145552457 in words is "one hundred forty-five million, five hundred fifty-two thousand, four hundred fifty-seven".