1012251240 has 576 divisors, whose sum is σ = 4502010240. Its totient is φ = 190494720.

The previous prime is 1012251223. The next prime is 1012251269. The reversal of 1012251240 is 421522101.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 19099054 + ... + 19099106.

It is an arithmetic number, because the mean of its divisors is an integer number (7815990).

Almost surely, 2^1012251240 is an apocalyptic number.

1012251240 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 1012251240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2251005120).

1012251240 is an abundant number, since it is smaller than the sum of its proper divisors (3489759000).

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

1012251240 is a wasteful number, since it uses less digits than its factorization.

1012251240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1012251240 is about 31815.8960269863. The cubic root of 1012251240 is about 1004.0671822687.

Adding to 1012251240 its reverse (421522101), we get a palindrome (1433773341).

It can be divided in two parts, 1012 and 251240, that added together give a palindrome (252252).

The spelling of 1012251240 in words is "one billion, twelve million, two hundred fifty-one thousand, two hundred forty".