145671457 has 2 divisors, whose sum is σ = 145671458. Its totient is φ = 145671456.

The previous prime is 145671431. The next prime is 145671469. The reversal of 145671457 is 754176541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127215841 + 18455616 = 11279^2 + 4296^2 .

It is a cyclic number.

It is not a de Polignac number, because 145671457 - 2⁷ = 145671329 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145677457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72835728 + 72835729.

It is an arithmetic number, because the mean of its divisors is an integer number (72835729).

Almost surely, 2^145671457 is an apocalyptic number.

It is an amenable number.

145671457 is a deficient number, since it is larger than the sum of its proper divisors (1).

145671457 is an equidigital number, since it uses as much as digits as its factorization.

145671457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 117600, while the sum is 40.

The square root of 145671457 is about 12069.4431105996. The cubic root of 145671457 is about 526.1684716748.

The spelling of 145671457 in words is "one hundred forty-five million, six hundred seventy-one thousand, four hundred fifty-seven".