1020154240 has 128 divisors (see below), whose sum is σ = 2833657920. Its totient is φ = 343941120.

The previous prime is 1020154193. The next prime is 1020154243. The reversal of 1020154240 is 424510201.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020154243) 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 15 ways as a sum of consecutive naturals, for example, 271414 + ... + 275146.

Almost surely, 2^1020154240 is an apocalyptic number.

1020154240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1020154240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1416828960).

1020154240 is an abundant number, since it is smaller than the sum of its proper divisors (1813503680).

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

1020154240 is an equidigital number, since it uses as much as digits as its factorization.

1020154240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3820 (or 3808 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 1020154240 is about 31939.8534749300. The cubic root of 1020154240 is about 1006.6734460508.

Adding to 1020154240 its reverse (424510201), we get a palindrome (1444664441).

The spelling of 1020154240 in words is "one billion, twenty million, one hundred fifty-four thousand, two hundred forty".