145523401 has 2 divisors, whose sum is σ = 145523402. Its totient is φ = 145523400.

The previous prime is 145523359. The next prime is 145523429. The reversal of 145523401 is 104325541.

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., 130507776 + 15015625 = 11424^2 + 3875^2 .

It is a cyclic number.

It is not a de Polignac number, because 145523401 - 2¹⁵ = 145490633 is a prime.

It is not a weakly prime, because it can be changed into another prime (145523471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72761700 + 72761701.

It is an arithmetic number, because the mean of its divisors is an integer number (72761701).

Almost surely, 2^145523401 is an apocalyptic number.

It is an amenable number.

145523401 is a deficient number, since it is larger than the sum of its proper divisors (1).

145523401 is an equidigital number, since it uses as much as digits as its factorization.

145523401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 145523401 is about 12063.3080454741. The cubic root of 145523401 is about 525.9901507502.

Adding to 145523401 its reverse (104325541), we get a palindrome (249848942).

It can be divided in two parts, 145523 and 401, that added together give a square (145924 = 382²).

The spelling of 145523401 in words is "one hundred forty-five million, five hundred twenty-three thousand, four hundred one".