245561472 has 192 divisors, whose sum is σ = 801964800. Its totient is φ = 71497728.

The previous prime is 245561461. The next prime is 245561497. The reversal of 245561472 is 274165542.

It is a happy number.

245561472 is a `hidden beast` number, since 24 + 5 + 561 + 4 + 72 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 284113 + ... + 284975.

It is an arithmetic number, because the mean of its divisors is an integer number (4176900).

Almost surely, 2^245561472 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 245561472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (400982400).

245561472 is an abundant number, since it is smaller than the sum of its proper divisors (556403328).

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

245561472 is a wasteful number, since it uses less digits than its factorization.

245561472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915 (or 900 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 245561472 is about 15670.4011435572. The cubic root of 245561472 is about 626.2101116024.

The spelling of 245561472 in words is "two hundred forty-five million, five hundred sixty-one thousand, four hundred seventy-two".