1525256436 has 96 divisors (see below), whose sum is σ = 3977487360. Its totient is φ = 451008000.

The previous prime is 1525256429. The next prime is 1525256437. The reversal of 1525256436 is 6346525251.

It is a junction number, because it is equal to n+sod(n) for n = 1525256394 and 1525256403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1525256437) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1175340 + ... + 1176636.

It is an arithmetic number, because the mean of its divisors is an integer number (41432160).

Almost surely, 2^1525256436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1525256436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1988743680).

1525256436 is an abundant number, since it is smaller than the sum of its proper divisors (2452230924).

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

1525256436 is a wasteful number, since it uses less digits than its factorization.

1525256436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525 (or 1523 counting only the distinct ones).

The product of its digits is 216000, while the sum is 39.

The square root of 1525256436 is about 39054.5315680524. The cubic root of 1525256436 is about 1151.1032729121.

The spelling of 1525256436 in words is "one billion, five hundred twenty-five million, two hundred fifty-six thousand, four hundred thirty-six".