4157969 has 4 divisors (see below), whose sum is σ = 4168740. Its totient is φ = 4147200.

The previous prime is 4157947. The next prime is 4157981. The reversal of 4157969 is 9697514.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2362369 + 1795600 = 1537^2 + 1340^2 .

It is a cyclic number.

It is not a de Polignac number, because 4157969 - 2¹⁶ = 4092433 is a prime.

It is a super-2 number, since 2×4157969² = 34577412409922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4157929) 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, 4784 + ... + 5585.

It is an arithmetic number, because the mean of its divisors is an integer number (1042185).

Almost surely, 2^4157969 is an apocalyptic number.

It is an amenable number.

4157969 is a deficient number, since it is larger than the sum of its proper divisors (10771).

4157969 is a wasteful number, since it uses less digits than its factorization.

4157969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10770.

The product of its digits is 68040, while the sum is 41.

The square root of 4157969 is about 2039.1098548141. The cubic root of 4157969 is about 160.8028527047.

The spelling of 4157969 in words is "four million, one hundred fifty-seven thousand, nine hundred sixty-nine".