145423249 has 2 divisors, whose sum is σ = 145423250. Its totient is φ = 145423248.

The previous prime is 145423199. The next prime is 145423303. The reversal of 145423249 is 942324541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144000000 + 1423249 = 12000^2 + 1193^2 .

It is a cyclic number.

It is not a de Polignac number, because 145423249 - 2¹⁷ = 145292177 is a prime.

It is a super-2 number, since 2×145423249² = 42295842699432002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145483249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72711624 + 72711625.

It is an arithmetic number, because the mean of its divisors is an integer number (72711625).

Almost surely, 2^145423249 is an apocalyptic number.

It is an amenable number.

145423249 is a deficient number, since it is larger than the sum of its proper divisors (1).

145423249 is an equidigital number, since it uses as much as digits as its factorization.

145423249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 34.

The square root of 145423249 is about 12059.1562308480. The cubic root of 145423249 is about 525.8694575496.

The spelling of 145423249 in words is "one hundred forty-five million, four hundred twenty-three thousand, two hundred forty-nine".