145204261 has 2 divisors, whose sum is σ = 145204262. Its totient is φ = 145204260.

The previous prime is 145204237. The next prime is 145204271. The reversal of 145204261 is 162402541.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132020100 + 13184161 = 11490^2 + 3631^2 .

It is a cyclic number.

It is not a de Polignac number, because 145204261 - 2²⁷ = 10986533 is a prime.

It is a super-2 number, since 2×145204261² = 42168554825112242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145204271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72602130 + 72602131.

It is an arithmetic number, because the mean of its divisors is an integer number (72602131).

Almost surely, 2^145204261 is an apocalyptic number.

It is an amenable number.

145204261 is a deficient number, since it is larger than the sum of its proper divisors (1).

145204261 is an equidigital number, since it uses as much as digits as its factorization.

145204261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 145204261 is about 12050.0730703179. The cubic root of 145204261 is about 525.6053618732.

It can be divided in two parts, 14520 and 4261, that added together give a palindrome (18781).

The spelling of 145204261 in words is "one hundred forty-five million, two hundred four thousand, two hundred sixty-one".