1525113240 has 192 divisors, whose sum is σ = 5355473760. Its totient is φ = 346429440.

The previous prime is 1525113221. The next prime is 1525113259. The reversal of 1525113240 is 423115251.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1525113221) and next prime (1525113259).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1525113240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1063564 + ... + 1064996.

Almost surely, 2^1525113240 is an apocalyptic number.

1525113240 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 1525113240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2677736880).

1525113240 is an abundant number, since it is smaller than the sum of its proper divisors (3830360520).

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

1525113240 is a wasteful number, since it uses less digits than its factorization.

1525113240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1642 (or 1631 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1525113240 is about 39052.6982422470. The cubic root of 1525113240 is about 1151.0672486871.

Adding to 1525113240 its reverse (423115251), we get a palindrome (1948228491).

The spelling of 1525113240 in words is "one billion, five hundred twenty-five million, one hundred thirteen thousand, two hundred forty".