145426657 has 2 divisors, whose sum is σ = 145426658. Its totient is φ = 145426656.

The previous prime is 145426643. The next prime is 145426663. The reversal of 145426657 is 756624541.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135466321 + 9960336 = 11639^2 + 3156^2 .

It is a cyclic number.

It is not a de Polignac number, because 145426657 - 2⁷ = 145426529 is a prime.

It is a super-2 number, since 2×145426657² = 42297825132391298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145420657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72713328 + 72713329.

It is an arithmetic number, because the mean of its divisors is an integer number (72713329).

Almost surely, 2^145426657 is an apocalyptic number.

It is an amenable number.

145426657 is a deficient number, since it is larger than the sum of its proper divisors (1).

145426657 is an equidigital number, since it uses as much as digits as its factorization.

145426657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 201600, while the sum is 40.

The square root of 145426657 is about 12059.2975334387. The cubic root of 145426657 is about 525.8735654419.

The spelling of 145426657 in words is "one hundred forty-five million, four hundred twenty-six thousand, six hundred fifty-seven".