145741657 has 4 divisors (see below), whose sum is σ = 145941220. Its totient is φ = 145542096.

The previous prime is 145741643. The next prime is 145741667. The reversal of 145741657 is 756147541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 133379401 + 12362256 = 11549^2 + 3516^2 .

It is a cyclic number.

It is not a de Polignac number, because 145741657 - 2⁷ = 145741529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145741667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98682 + ... + 100147.

It is an arithmetic number, because the mean of its divisors is an integer number (36485305).

Almost surely, 2^145741657 is an apocalyptic number.

It is an amenable number.

145741657 is a deficient number, since it is larger than the sum of its proper divisors (199563).

145741657 is an equidigital number, since it uses as much as digits as its factorization.

145741657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199562.

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

The square root of 145741657 is about 12072.3509309496. The cubic root of 145741657 is about 526.2529794104.

The spelling of 145741657 in words is "one hundred forty-five million, seven hundred forty-one thousand, six hundred fifty-seven".