1089249525 has 240 divisors, whose sum is σ = 2601333504. Its totient is φ = 437944320.

The previous prime is 1089249509. The next prime is 1089249529. The reversal of 1089249525 is 5259429801.

It is a happy number.

1089249525 is a `hidden beast` number, since 1 + 0 + 89 + 2 + 49 + 525 = 666.

It is not a de Polignac number, because 1089249525 - 2⁴ = 1089249509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089249529) by changing a digit.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 4238197 + ... + 4238453.

Almost surely, 2^1089249525 is an apocalyptic number.

1089249525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1089249525 is an abundant number, since it is smaller than the sum of its proper divisors (1512083979).

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

1089249525 is a wasteful number, since it uses less digits than its factorization.

1089249525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322 (or 308 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The square root of 1089249525 is about 33003.7804652740. The cubic root of 1089249525 is about 1028.9062210008.

The spelling of 1089249525 in words is "one billion, eighty-nine million, two hundred forty-nine thousand, five hundred twenty-five".