145251019 has 4 divisors (see below), whose sum is σ = 147296880. Its totient is φ = 143205160.

The previous prime is 145251017. The next prime is 145251023. The reversal of 145251019 is 910152541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 910152541 = 1033 ⋅881077.

It is a cyclic number.

It is not a de Polignac number, because 145251019 - 2¹ = 145251017 is a prime.

It is a super-2 number, since 2×145251019² = 42195717041076722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145251013) 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 3 ways as a sum of consecutive naturals, for example, 1022824 + ... + 1022965.

It is an arithmetic number, because the mean of its divisors is an integer number (36824220).

Almost surely, 2^145251019 is an apocalyptic number.

145251019 is a deficient number, since it is larger than the sum of its proper divisors (2045861).

145251019 is an equidigital number, since it uses as much as digits as its factorization.

145251019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2045860.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 145251019 is about 12052.0130683633. The cubic root of 145251019 is about 525.6617734823.

The spelling of 145251019 in words is "one hundred forty-five million, two hundred fifty-one thousand, nineteen".