145148781 has 8 divisors (see below), whose sum is σ = 193768480. Its totient is φ = 96647472.

The previous prime is 145148777. The next prime is 145148807. The reversal of 145148781 is 187841541.

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

It is not a de Polignac number, because 145148781 - 2² = 145148777 is a prime.

It is a super-2 number, since 2×145148781² = 42136337251571922, 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 (145148701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26695 + ... + 31668.

It is an arithmetic number, because the mean of its divisors is an integer number (24221060).

Almost surely, 2^145148781 is an apocalyptic number.

It is an amenable number.

145148781 is a deficient number, since it is larger than the sum of its proper divisors (48619699).

145148781 is an equidigital number, since it uses as much as digits as its factorization.

145148781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59195.

The product of its digits is 35840, while the sum is 39.

The square root of 145148781 is about 12047.7707896523. The cubic root of 145148781 is about 525.5384118173.

The spelling of 145148781 in words is "one hundred forty-five million, one hundred forty-eight thousand, seven hundred eighty-one".