245561420 has 24 divisors (see below), whose sum is σ = 555347184. Its totient is φ = 90668736.

The previous prime is 245561419. The next prime is 245561429. The reversal of 245561420 is 24165542.

245561420 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (245561429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 471974 + ... + 472493.

It is an arithmetic number, because the mean of its divisors is an integer number (23139466).

Almost surely, 2^245561420 is an apocalyptic number.

245561420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245561420 is an abundant number, since it is smaller than the sum of its proper divisors (309785764).

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

245561420 is a wasteful number, since it uses less digits than its factorization.

245561420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944489 (or 944487 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 245561420 is about 15670.3994843782. The cubic root of 245561420 is about 626.2100674004.

The spelling of 245561420 in words is "two hundred forty-five million, five hundred sixty-one thousand, four hundred twenty".