3611965 has 16 divisors (see below), whose sum is σ = 5114880. Its totient is φ = 2396160.

The previous prime is 3611947. The next prime is 3611981. The reversal of 3611965 is 5691163.

It is not a de Polignac number, because 3611965 - 2⁹ = 3611453 is a prime.

It is a super-2 number, since 2×3611965² = 26092582322450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 580 + ... + 2749.

It is an arithmetic number, because the mean of its divisors is an integer number (319680).

Almost surely, 2^3611965 is an apocalyptic number.

3611965 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3611965 is a deficient number, since it is larger than the sum of its proper divisors (1502915).

3611965 is a wasteful number, since it uses less digits than its factorization.

3611965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3372.

The product of its digits is 4860, while the sum is 31.

The square root of 3611965 is about 1900.5170349144. The cubic root of 3611965 is about 153.4314930181.

It can be divided in two parts, 361196 and 5, that added together give a square (361201 = 601²).

The spelling of 3611965 in words is "three million, six hundred eleven thousand, nine hundred sixty-five".