145142440 has 16 divisors (see below), whose sum is σ = 326570580. Its totient is φ = 58056960.

The previous prime is 145142411. The next prime is 145142479. The reversal of 145142440 is 44241541.

It can be written as a sum of positive squares in 2 ways, for example, as 138721284 + 6421156 = 11778^2 + 2534^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1814241 + ... + 1814320.

Almost surely, 2^145142440 is an apocalyptic number.

145142440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145142440 is an abundant number, since it is smaller than the sum of its proper divisors (181428140).

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

145142440 is a wasteful number, since it uses less digits than its factorization.

145142440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3628572 (or 3628568 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 145142440 is about 12047.5076260611. The cubic root of 145142440 is about 525.5307587789.

Adding to 145142440 its reverse (44241541), we get a palindrome (189383981).

The spelling of 145142440 in words is "one hundred forty-five million, one hundred forty-two thousand, four hundred forty".