145540426 has 4 divisors (see below), whose sum is σ = 218310642. Its totient is φ = 72770212.

The previous prime is 145540387. The next prime is 145540427. The reversal of 145540426 is 624045541.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 114169225 + 31371201 = 10685^2 + 5601^2 .

It is a super-2 number, since 2×145540426² = 42364031200522952, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (145540427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36385105 + ... + 36385108.

Almost surely, 2^145540426 is an apocalyptic number.

145540426 is a deficient number, since it is larger than the sum of its proper divisors (72770216).

145540426 is an equidigital number, since it uses as much as digits as its factorization.

145540426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72770215.

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 145540426 is about 12064.0136770480. The cubic root of 145540426 is about 526.0106620748.

Adding to 145540426 its reverse (624045541), we get a palindrome (769585967).

The spelling of 145540426 in words is "one hundred forty-five million, five hundred forty thousand, four hundred twenty-six".