145140049 has 2 divisors, whose sum is σ = 145140050. Its totient is φ = 145140048.

The previous prime is 145140019. The next prime is 145140071. The reversal of 145140049 is 940041541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87759424 + 57380625 = 9368^2 + 7575^2 .

It is an emirp because it is prime and its reverse (940041541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145140049 - 2¹⁹ = 144615761 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 145139999 and 145140026.

It is not a weakly prime, because it can be changed into another prime (145140019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72570024 + 72570025.

It is an arithmetic number, because the mean of its divisors is an integer number (72570025).

Almost surely, 2^145140049 is an apocalyptic number.

It is an amenable number.

145140049 is a deficient number, since it is larger than the sum of its proper divisors (1).

145140049 is an equidigital number, since it uses as much as digits as its factorization.

145140049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 145140049 is about 12047.4083935094. The cubic root of 145140049 is about 525.5278729909.

The spelling of 145140049 in words is "one hundred forty-five million, one hundred forty thousand, forty-nine".