145019651 has 4 divisors (see below), whose sum is σ = 165736752. Its totient is φ = 124302552.

The previous prime is 145019629. The next prime is 145019653. The reversal of 145019651 is 156910541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 156910541 = 389 ⋅403369.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145019651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145019653) 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 in 3 ways as a sum of consecutive naturals, for example, 10358540 + ... + 10358553.

It is an arithmetic number, because the mean of its divisors is an integer number (41434188).

Almost surely, 2^145019651 is an apocalyptic number.

145019651 is a deficient number, since it is larger than the sum of its proper divisors (20717101).

145019651 is an equidigital number, since it uses as much as digits as its factorization.

145019651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20717100.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 145019651 is about 12042.4105145108. The cubic root of 145019651 is about 525.3825191095.

The spelling of 145019651 in words is "one hundred forty-five million, nineteen thousand, six hundred fifty-one".