1020140445 has 16 divisors (see below), whose sum is σ = 1632697920. Its totient is φ = 543917184.

The previous prime is 1020140423. The next prime is 1020140491. The reversal of 1020140445 is 5440410201.

It is a happy number.

It is not a de Polignac number, because 1020140445 - 2⁸ = 1020140189 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59226 + ... + 74484.

It is an arithmetic number, because the mean of its divisors is an integer number (102043620).

Almost surely, 2^1020140445 is an apocalyptic number.

1020140445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1020140445 is a deficient number, since it is larger than the sum of its proper divisors (612557475).

1020140445 is a wasteful number, since it uses less digits than its factorization.

1020140445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19724.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 1020140445 is about 31939.6375214247. The cubic root of 1020140445 is about 1006.6689084615.

Adding to 1020140445 its reverse (5440410201), we get a palindrome (6460550646).

The spelling of 1020140445 in words is "one billion, twenty million, one hundred forty thousand, four hundred forty-five".