3721554 has 48 divisors (see below), whose sum is σ = 8491392. Its totient is φ = 1176864.

The previous prime is 3721537. The next prime is 3721559. The reversal of 3721554 is 4551273.

3721554 = T₂₅₇ + T₂₅₈ + ... + T₃₃₉.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3721559) 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, 44797 + ... + 44879.

It is an arithmetic number, because the mean of its divisors is an integer number (176904).

Almost surely, 2^3721554 is an apocalyptic number.

3721554 is an abundant number, since it is smaller than the sum of its proper divisors (4769838).

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

3721554 is a wasteful number, since it uses less digits than its factorization.

3721554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 188 counting only the distinct ones).

The product of its digits is 4200, while the sum is 27.

The square root of 3721554 is about 1929.1329658683. The cubic root of 3721554 is about 154.9677907406.

The spelling of 3721554 in words is "three million, seven hundred twenty-one thousand, five hundred fifty-four".