1625421504 has 112 divisors (see below), whose sum is σ = 4982594048. Its totient is φ = 458016768.

The previous prime is 1625421491. The next prime is 1625421517. The reversal of 1625421504 is 4051245261.

It is an interprime number because it is at equal distance from previous prime (1625421491) and next prime (1625421517).

It is a tau number, because it is divible by the number of its divisors (112).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89829 + ... + 106395.

Almost surely, 2^1625421504 is an apocalyptic number.

1625421504 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1625421504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2491297024).

1625421504 is an abundant number, since it is smaller than the sum of its proper divisors (3357172544).

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

1625421504 is a wasteful number, since it uses less digits than its factorization.

1625421504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16662 (or 16652 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 1625421504 is about 40316.5165161873. The cubic root of 1625421504 is about 1175.7689860446.

Adding to 1625421504 its reverse (4051245261), we get a palindrome (5676666765).

The spelling of 1625421504 in words is "one billion, six hundred twenty-five million, four hundred twenty-one thousand, five hundred four".