145457719 has 8 divisors (see below), whose sum is σ = 159342480. Its totient is φ = 131683200.

The previous prime is 145457717. The next prime is 145457743. The reversal of 145457719 is 917754541.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145457719 - 2¹ = 145457717 is a prime.

It is a super-2 number, since 2×145457719² = 42315896033365922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145457713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24784 + ... + 30085.

It is an arithmetic number, because the mean of its divisors is an integer number (19917810).

Almost surely, 2^145457719 is an apocalyptic number.

145457719 is a deficient number, since it is larger than the sum of its proper divisors (13884761).

145457719 is a wasteful number, since it uses less digits than its factorization.

145457719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55121.

The product of its digits is 176400, while the sum is 43.

The square root of 145457719 is about 12060.5853506370. The cubic root of 145457719 is about 525.9110036076.

The spelling of 145457719 in words is "one hundred forty-five million, four hundred fifty-seven thousand, seven hundred nineteen".