4261209 has 4 divisors (see below), whose sum is σ = 5681616. Its totient is φ = 2840804.

The previous prime is 4261199. The next prime is 4261211. The reversal of 4261209 is 9021624.

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 a cyclic number.

It is not a de Polignac number, because 4261209 - 2⁴ = 4261193 is a prime.

It is a D-number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4261219) 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, 710199 + ... + 710204.

It is an arithmetic number, because the mean of its divisors is an integer number (1420404).

Almost surely, 2^4261209 is an apocalyptic number.

It is an amenable number.

4261209 is a deficient number, since it is larger than the sum of its proper divisors (1420407).

4261209 is a wasteful number, since it uses less digits than its factorization.

4261209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1420406.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 4261209 is about 2064.2696044848. The cubic root of 4261209 is about 162.1228682264.

It can be divided in two parts, 42 and 61209, that multiplied together give a triangular number (2570778 = T₂₂₆₇).

The spelling of 4261209 in words is "four million, two hundred sixty-one thousand, two hundred nine".