145231469 has 2 divisors, whose sum is σ = 145231470. Its totient is φ = 145231468.

The previous prime is 145231451. The next prime is 145231487. The reversal of 145231469 is 964132541.

It is a balanced prime because it is at equal distance from previous prime (145231451) and next prime (145231487).

It can be written as a sum of positive squares in only one way, i.e., 143760100 + 1471369 = 11990^2 + 1213^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145231469 is a prime.

It is a super-2 number, since 2×145231469² = 42184359175795922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145231409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72615734 + 72615735.

It is an arithmetic number, because the mean of its divisors is an integer number (72615735).

Almost surely, 2^145231469 is an apocalyptic number.

It is an amenable number.

145231469 is a deficient number, since it is larger than the sum of its proper divisors (1).

145231469 is an equidigital number, since it uses as much as digits as its factorization.

145231469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 35.

The square root of 145231469 is about 12051.2019732473. The cubic root of 145231469 is about 525.6381886821.

The spelling of 145231469 in words is "one hundred forty-five million, two hundred thirty-one thousand, four hundred sixty-nine".