3729021 has 16 divisors (see below), whose sum is σ = 5196288. Its totient is φ = 2376000.

The previous prime is 3729017. The next prime is 3729031. The reversal of 3729021 is 1209273.

It is not a de Polignac number, because 3729021 - 2² = 3729017 is a prime.

3729021 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3728982 and 3729000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3729031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9195 + ... + 9591.

It is an arithmetic number, because the mean of its divisors is an integer number (324768).

Almost surely, 2^3729021 is an apocalyptic number.

3729021 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3729021 is a deficient number, since it is larger than the sum of its proper divisors (1467267).

3729021 is a wasteful number, since it uses less digits than its factorization.

3729021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 3729021 is about 1931.0673214572. The cubic root of 3729021 is about 155.0713649866.

The spelling of 3729021 in words is "three million, seven hundred twenty-nine thousand, twenty-one".