145555441 has 2 divisors, whose sum is σ = 145555442. Its totient is φ = 145555440.

The previous prime is 145555429. The next prime is 145555457. The reversal of 145555441 is 144555541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125350416 + 20205025 = 11196^2 + 4495^2 .

It is a cyclic number.

It is not a de Polignac number, because 145555441 - 2¹¹ = 145553393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 145555397 and 145555406.

It is not a weakly prime, because it can be changed into another prime (145555481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72777720 + 72777721.

It is an arithmetic number, because the mean of its divisors is an integer number (72777721).

Almost surely, 2^145555441 is an apocalyptic number.

It is an amenable number.

145555441 is a deficient number, since it is larger than the sum of its proper divisors (1).

145555441 is an equidigital number, since it uses as much as digits as its factorization.

145555441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40000, while the sum is 34.

The square root of 145555441 is about 12064.6359663274. The cubic root of 145555441 is about 526.0287504706.

The spelling of 145555441 in words is "one hundred forty-five million, five hundred fifty-five thousand, four hundred forty-one".