7144405 has 8 divisors (see below), whose sum is σ = 8652600. Its totient is φ = 5662656.

The previous prime is 7144387. The next prime is 7144409. The reversal of 7144405 is 5044417.

It can be written as a sum of positive squares in 4 ways, for example, as 904401 + 6240004 = 951^2 + 2498^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7144405 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7144405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7144409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6010 + ... + 7099.

It is an arithmetic number, because the mean of its divisors is an integer number (1081575).

Almost surely, 2^7144405 is an apocalyptic number.

It is an amenable number.

7144405 is a deficient number, since it is larger than the sum of its proper divisors (1508195).

7144405 is a wasteful number, since it uses less digits than its factorization.

7144405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13223.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 7144405 is about 2672.9019809937. The cubic root of 7144405 is about 192.5995886562.

The spelling of 7144405 in words is "seven million, one hundred forty-four thousand, four hundred five".