145440719 has 4 divisors (see below), whose sum is σ = 147611544. Its totient is φ = 143269896.

The previous prime is 145440683. The next prime is 145440721. The reversal of 145440719 is 917044541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 917044541 = 7 ⋅131006363.

It is a cyclic number.

It is not a de Polignac number, because 145440719 - 2¹² = 145436623 is a prime.

It is a super-2 number, since 2×145440719² = 42306005486473922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145440739) 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, 1085312 + ... + 1085445.

It is an arithmetic number, because the mean of its divisors is an integer number (36902886).

Almost surely, 2^145440719 is an apocalyptic number.

145440719 is a deficient number, since it is larger than the sum of its proper divisors (2170825).

145440719 is an equidigital number, since it uses as much as digits as its factorization.

145440719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2170824.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 145440719 is about 12059.8805549640. The cubic root of 145440719 is about 525.8905146402.

The spelling of 145440719 in words is "one hundred forty-five million, four hundred forty thousand, seven hundred nineteen".