145057657 has 4 divisors (see below), whose sum is σ = 145153936. Its totient is φ = 144961380.

The previous prime is 145057639. The next prime is 145057673. The reversal of 145057657 is 756750541.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 756750541 = 947 ⋅799103.

It is a cyclic number.

It is not a de Polignac number, because 145057657 - 2⁷ = 145057529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145057607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45843 + ... + 48904.

It is an arithmetic number, because the mean of its divisors is an integer number (36288484).

Almost surely, 2^145057657 is an apocalyptic number.

It is an amenable number.

145057657 is a deficient number, since it is larger than the sum of its proper divisors (96279).

145057657 is an equidigital number, since it uses as much as digits as its factorization.

145057657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96278.

The product of its (nonzero) digits is 147000, while the sum is 40.

The square root of 145057657 is about 12043.9884174637. The cubic root of 145057657 is about 525.4284116116.

The spelling of 145057657 in words is "one hundred forty-five million, fifty-seven thousand, six hundred fifty-seven".