3721257252 has 72 divisors (see below), whose sum is σ = 9659569920. Its totient is φ = 1207198080.

The previous prime is 3721257247. The next prime is 3721257257. The reversal of 3721257252 is 2527521273.

3721257252 is a `hidden beast` number, since 3 + 72 + 12 + 572 + 5 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (3721257247) and next prime (3721257257).

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

It is not an unprimeable number, because it can be changed into a prime (3721257257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 645093 + ... + 650835.

Almost surely, 2^3721257252 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 3721257252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4829784960).

3721257252 is an abundant number, since it is smaller than the sum of its proper divisors (5938312668).

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

3721257252 is a wasteful number, since it uses less digits than its factorization.

3721257252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6233 (or 6228 counting only the distinct ones).

The product of its digits is 58800, while the sum is 36.

The square root of 3721257252 is about 61002.1085865071. The cubic root of 3721257252 is about 1549.6367170817.

The spelling of 3721257252 in words is "three billion, seven hundred twenty-one million, two hundred fifty-seven thousand, two hundred fifty-two".