145378241 has 2 divisors, whose sum is σ = 145378242. Its totient is φ = 145378240.

The previous prime is 145378231. The next prime is 145378243. The reversal of 145378241 is 142873541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73891216 + 71487025 = 8596^2 + 8455^2 .

It is a cyclic number.

It is not a de Polignac number, because 145378241 - 2¹⁴ = 145361857 is a prime.

It is a super-2 number, since 2×145378241² = 42269665912508162, which contains 22 as substring.

Together with 145378243, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145378243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72689120 + 72689121.

It is an arithmetic number, because the mean of its divisors is an integer number (72689121).

Almost surely, 2^145378241 is an apocalyptic number.

It is an amenable number.

145378241 is a deficient number, since it is larger than the sum of its proper divisors (1).

145378241 is an equidigital number, since it uses as much as digits as its factorization.

145378241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 35.

The square root of 145378241 is about 12057.2899525557. The cubic root of 145378241 is about 525.8152003501.

The spelling of 145378241 in words is "one hundred forty-five million, three hundred seventy-eight thousand, two hundred forty-one".