3742581 has 4 divisors (see below), whose sum is σ = 4990112. Its totient is φ = 2495052.

The previous prime is 3742579. The next prime is 3742621. The reversal of 3742581 is 1852473.

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.

It is not a de Polignac number, because 3742581 - 2¹ = 3742579 is a prime.

It is a super-2 number, since 2×3742581² = 28013825083122, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3742561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 623761 + ... + 623766.

It is an arithmetic number, because the mean of its divisors is an integer number (1247528).

Almost surely, 2^3742581 is an apocalyptic number.

It is an amenable number.

3742581 is a deficient number, since it is larger than the sum of its proper divisors (1247531).

3742581 is a wasteful number, since it uses less digits than its factorization.

3742581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247530.

The product of its digits is 6720, while the sum is 30.

The square root of 3742581 is about 1934.5751471576. The cubic root of 3742581 is about 155.2591018440.

The spelling of 3742581 in words is "three million, seven hundred forty-two thousand, five hundred eighty-one".