1764421725 has 24 divisors (see below), whose sum is σ = 3182376672. Its totient is φ = 855476800.

The previous prime is 1764421723. The next prime is 1764421739. The reversal of 1764421725 is 5271244671.

It is not a de Polignac number, because 1764421725 - 2¹ = 1764421723 is a prime.

It is a super-2 number, since 2×1764421725² = 6226368047303951250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1764421723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1068522 + ... + 1070171.

It is an arithmetic number, because the mean of its divisors is an integer number (132599028).

Almost surely, 2^1764421725 is an apocalyptic number.

1764421725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1764421725 is a deficient number, since it is larger than the sum of its proper divisors (1417954947).

1764421725 is a wasteful number, since it uses less digits than its factorization.

1764421725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2138717 (or 2138712 counting only the distinct ones).

The product of its digits is 94080, while the sum is 39.

The square root of 1764421725 is about 42005.0202356814. The cubic root of 1764421725 is about 1208.3724047083.

The spelling of 1764421725 in words is "one billion, seven hundred sixty-four million, four hundred twenty-one thousand, seven hundred twenty-five".