145271057 has 2 divisors, whose sum is σ = 145271058. Its totient is φ = 145271056.

The previous prime is 145271047. The next prime is 145271083. The reversal of 145271057 is 750172541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137921536 + 7349521 = 11744^2 + 2711^2 .

It is an emirp because it is prime and its reverse (750172541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145271057 - 2¹⁰ = 145270033 is a prime.

It is a super-2 number, since 2×145271057² = 42207360003794498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145271047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72635528 + 72635529.

It is an arithmetic number, because the mean of its divisors is an integer number (72635529).

Almost surely, 2^145271057 is an apocalyptic number.

It is an amenable number.

145271057 is a deficient number, since it is larger than the sum of its proper divisors (1).

145271057 is an equidigital number, since it uses as much as digits as its factorization.

145271057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9800, while the sum is 32.

The square root of 145271057 is about 12052.8443530977. The cubic root of 145271057 is about 525.6859448016.

The spelling of 145271057 in words is "one hundred forty-five million, two hundred seventy-one thousand, fifty-seven".