145403442 has 12 divisors (see below), whose sum is σ = 315040830. Its totient is φ = 48467808.

The previous prime is 145403441. The next prime is 145403449. The reversal of 145403442 is 244304541.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 88566921 + 56836521 = 9411^2 + 7539^2 .

It is a super-2 number, since 2×145403442² = 42284321890894728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145403441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4038967 + ... + 4039002.

Almost surely, 2^145403442 is an apocalyptic number.

145403442 is an abundant number, since it is smaller than the sum of its proper divisors (169637388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145403442 is a wasteful number, since it uses less digits than its factorization.

145403442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8077977 (or 8077974 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 145403442 is about 12058.3349596866. The cubic root of 145403442 is about 525.8455815662.

Adding to 145403442 its reverse (244304541), we get a palindrome (389707983).

The spelling of 145403442 in words is "one hundred forty-five million, four hundred three thousand, four hundred forty-two".