725745420 has 60 divisors (see below), whose sum is σ = 2276695344. Its totient is φ = 193531680.

The previous prime is 725745409. The next prime is 725745431. The reversal of 725745420 is 24547527.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (725745409) and next prime (725745431).

It is a tau number, because it is divible by the number of its divisors (60).

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 19 ways as a sum of consecutive naturals, for example, 222376 + ... + 225615.

Almost surely, 2^725745420 is an apocalyptic number.

It is an amenable number.

725745420 is an abundant number, since it is smaller than the sum of its proper divisors (1550949924).

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

725745420 is a wasteful number, since it uses less digits than its factorization.

725745420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448012 (or 448001 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 36.

The square root of 725745420 is about 26939.6625814059. The cubic root of 725745420 is about 898.6586685820.

The spelling of 725745420 in words is "seven hundred twenty-five million, seven hundred forty-five thousand, four hundred twenty".