3721519 has 4 divisors (see below), whose sum is σ = 3841600. Its totient is φ = 3601440.

The previous prime is 3721489. The next prime is 3721537. The reversal of 3721519 is 9151273.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3721519 - 2⁷ = 3721391 is a prime.

It is a super-2 number, since 2×3721519² = 27699407334722, which contains 22 as substring.

It is a Duffinian number.

3721519 is a lucky 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 3 ways as a sum of consecutive naturals, for example, 59994 + ... + 60055.

It is an arithmetic number, because the mean of its divisors is an integer number (960400).

Almost surely, 2^3721519 is an apocalyptic number.

3721519 is a deficient number, since it is larger than the sum of its proper divisors (120081).

3721519 is a wasteful number, since it uses less digits than its factorization.

3721519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120080.

The product of its digits is 1890, while the sum is 28.

The square root of 3721519 is about 1929.1238944142. The cubic root of 3721519 is about 154.9673049319.

It can be divided in two parts, 372 and 1519, that added together give a triangular number (1891 = T₆₁).

The spelling of 3721519 in words is "three million, seven hundred twenty-one thousand, five hundred nineteen".