3781250 has 42 divisors (see below), whose sum is σ = 7792869. Its totient is φ = 1375000.

The previous prime is 3781249. The next prime is 3781277. The reversal of 3781250 is 521873.

It can be written as a sum of positive squares in 4 ways, for example, as 644809 + 3136441 = 803^2 + 1771^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=1375.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 343745 + ... + 343755.

Almost surely, 2^3781250 is an apocalyptic number.

3781250 is an abundant number, since it is smaller than the sum of its proper divisors (4011619).

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

3781250 is an frugal number, since it uses more digits than its factorization.

3781250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54 (or 18 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 3781250 is about 1944.5436482630. The cubic root of 3781250 is about 155.7919921092.

The spelling of 3781250 in words is "three million, seven hundred eighty-one thousand, two hundred fifty".