145402447 has 2 divisors, whose sum is σ = 145402448. Its totient is φ = 145402446.

The previous prime is 145402417. The next prime is 145402457. The reversal of 145402447 is 744204541.

145402447 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145402447 - 2¹¹ = 145400399 is a prime.

It is a super-2 number, since 2×145402447² = 42283743187175618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145402417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72701223 + 72701224.

It is an arithmetic number, because the mean of its divisors is an integer number (72701224).

Almost surely, 2^145402447 is an apocalyptic number.

145402447 is a deficient number, since it is larger than the sum of its proper divisors (1).

145402447 is an equidigital number, since it uses as much as digits as its factorization.

145402447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17920, while the sum is 31.

The square root of 145402447 is about 12058.2937018469. The cubic root of 145402447 is about 525.8443821045.

Adding to 145402447 its reverse (744204541), we get a palindrome (889606988).

The spelling of 145402447 in words is "one hundred forty-five million, four hundred two thousand, four hundred forty-seven".