7420161 has 8 divisors (see below), whose sum is σ = 11306944. Its totient is φ = 4240080.

The previous prime is 7420157. The next prime is 7420169. The reversal of 7420161 is 1610247.

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

It is not a de Polignac number, because 7420161 - 2² = 7420157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 353341 = 7420161 / (7 + 4 + 2 + 0 + 1 + 6 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7420169) 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, 176650 + ... + 176691.

It is an arithmetic number, because the mean of its divisors is an integer number (1413368).

Almost surely, 2^7420161 is an apocalyptic number.

It is an amenable number.

7420161 is a deficient number, since it is larger than the sum of its proper divisors (3886783).

7420161 is a wasteful number, since it uses less digits than its factorization.

7420161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353351.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 7420161 is about 2723.9972466946. The cubic root of 7420161 is about 195.0463269286.

The spelling of 7420161 in words is "seven million, four hundred twenty thousand, one hundred sixty-one".