145716019 has 4 divisors (see below), whose sum is σ = 147218344. Its totient is φ = 144213696.

The previous prime is 145715963. The next prime is 145716037. The reversal of 145716019 is 910617541.

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

It is a cyclic number.

It is not a de Polignac number, because 145716019 - 2¹⁷ = 145584947 is a prime.

It is a super-2 number, since 2×145716019² = 42466316386416722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145716119) 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, 751017 + ... + 751210.

It is an arithmetic number, because the mean of its divisors is an integer number (36804586).

Almost surely, 2^145716019 is an apocalyptic number.

145716019 is a deficient number, since it is larger than the sum of its proper divisors (1502325).

145716019 is an equidigital number, since it uses as much as digits as its factorization.

145716019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1502324.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 145716019 is about 12071.2890363871. The cubic root of 145716019 is about 526.2221191759. Note that the first 3 decimals are identical.

The spelling of 145716019 in words is "one hundred forty-five million, seven hundred sixteen thousand, nineteen".