145473761 has 2 divisors, whose sum is σ = 145473762. Its totient is φ = 145473760.

The previous prime is 145473733. The next prime is 145473767. The reversal of 145473761 is 167374541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135582736 + 9891025 = 11644^2 + 3145^2 .

It is a cyclic number.

It is not a de Polignac number, because 145473761 - 2⁶ = 145473697 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145473767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72736880 + 72736881.

It is an arithmetic number, because the mean of its divisors is an integer number (72736881).

Almost surely, 2^145473761 is an apocalyptic number.

It is an amenable number.

145473761 is a deficient number, since it is larger than the sum of its proper divisors (1).

145473761 is an equidigital number, since it uses as much as digits as its factorization.

145473761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 38.

The square root of 145473761 is about 12061.2503912322. The cubic root of 145473761 is about 525.9303364974.

The spelling of 145473761 in words is "one hundred forty-five million, four hundred seventy-three thousand, seven hundred sixty-one".