145400144 has 10 divisors (see below), whose sum is σ = 281712810. Its totient is φ = 72700064.

The previous prime is 145400111. The next prime is 145400153. The reversal of 145400144 is 441004541.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 74166544 + 71233600 = 8612^2 + 8440^2 .

It is a super-2 number, since 2×145400144² = 42282403750441472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4543739 + ... + 4543770.

It is an arithmetic number, because the mean of its divisors is an integer number (28171281).

Almost surely, 2^145400144 is an apocalyptic number.

It is an amenable number.

145400144 is a deficient number, since it is larger than the sum of its proper divisors (136312666).

145400144 is an equidigital number, since it uses as much as digits as its factorization.

145400144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9087517 (or 9087511 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 145400144 is about 12058.1982070291. The cubic root of 145400144 is about 525.8416058422.

Adding to 145400144 its reverse (441004541), we get a palindrome (586404685).

The spelling of 145400144 in words is "one hundred forty-five million, four hundred thousand, one hundred forty-four".