145120897 has 2 divisors, whose sum is σ = 145120898. Its totient is φ = 145120896.

The previous prime is 145120817. The next prime is 145120939. The reversal of 145120897 is 798021541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142659136 + 2461761 = 11944^2 + 1569^2 .

It is an emirp because it is prime and its reverse (798021541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145120897 - 2¹⁵ = 145088129 is a prime.

It is not a weakly prime, because it can be changed into another prime (145120817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72560448 + 72560449.

It is an arithmetic number, because the mean of its divisors is an integer number (72560449).

Almost surely, 2^145120897 is an apocalyptic number.

It is an amenable number.

145120897 is a deficient number, since it is larger than the sum of its proper divisors (1).

145120897 is an equidigital number, since it uses as much as digits as its factorization.

145120897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 145120897 is about 12046.6135075381. The cubic root of 145120897 is about 525.5047565765.

The spelling of 145120897 in words is "one hundred forty-five million, one hundred twenty thousand, eight hundred ninety-seven".