3756505 has 4 divisors (see below), whose sum is σ = 4507812. Its totient is φ = 3005200.

The previous prime is 3756503. The next prime is 3756517. The reversal of 3756505 is 5056573.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5056573 = 23 ⋅219851.

It can be written as a sum of positive squares in 2 ways, for example, as 644809 + 3111696 = 803^2 + 1764^2 .

It is not a de Polignac number, because 3756505 - 2¹ = 3756503 is a prime.

It is a super-2 number, since 2×3756505² = 28222659630050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3756503) 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, 375646 + ... + 375655.

It is an arithmetic number, because the mean of its divisors is an integer number (1126953).

Almost surely, 2^3756505 is an apocalyptic number.

It is an amenable number.

3756505 is a deficient number, since it is larger than the sum of its proper divisors (751307).

3756505 is an equidigital number, since it uses as much as digits as its factorization.

3756505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751306.

The product of its (nonzero) digits is 15750, while the sum is 31.

The square root of 3756505 is about 1938.1705291331. The cubic root of 3756505 is about 155.4514069482.

It can be divided in two parts, 3 and 756505, that multiplied together give a triangular number (2269515 = T₂₁₃₀).

The spelling of 3756505 in words is "three million, seven hundred fifty-six thousand, five hundred five".