3724781 has 4 divisors (see below), whose sum is σ = 3886752. Its totient is φ = 3562812.

The previous prime is 3724757. The next prime is 3724807. The reversal of 3724781 is 1874273.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1874273 = 1187 ⋅1579.

It is a cyclic number.

It is not a de Polignac number, because 3724781 - 2¹⁸ = 3462637 is a prime.

It is a super-2 number, since 2×3724781² = 27747986995922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3724711) 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, 80951 + ... + 80996.

It is an arithmetic number, because the mean of its divisors is an integer number (971688).

Almost surely, 2^3724781 is an apocalyptic number.

It is an amenable number.

3724781 is a deficient number, since it is larger than the sum of its proper divisors (161971).

3724781 is a wasteful number, since it uses less digits than its factorization.

3724781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161970.

The product of its digits is 9408, while the sum is 32.

The square root of 3724781 is about 1929.9691707382. The cubic root of 3724781 is about 155.0125692200.

The spelling of 3724781 in words is "three million, seven hundred twenty-four thousand, seven hundred eighty-one".