145751657 has 2 divisors, whose sum is σ = 145751658. Its totient is φ = 145751656.

The previous prime is 145751633. The next prime is 145751663. The reversal of 145751657 is 756157541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113443801 + 32307856 = 10651^2 + 5684^2 .

It is an emirp because it is prime and its reverse (756157541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145751657 - 2²⁰ = 144703081 is a prime.

It is not a weakly prime, because it can be changed into another prime (145751357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72875828 + 72875829.

It is an arithmetic number, because the mean of its divisors is an integer number (72875829).

Almost surely, 2^145751657 is an apocalyptic number.

It is an amenable number.

145751657 is a deficient number, since it is larger than the sum of its proper divisors (1).

145751657 is an equidigital number, since it uses as much as digits as its factorization.

145751657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 147000, while the sum is 41.

The square root of 145751657 is about 12072.7650933827. The cubic root of 145751657 is about 526.2650153411.

The spelling of 145751657 in words is "one hundred forty-five million, seven hundred fifty-one thousand, six hundred fifty-seven".