4157961 has 4 divisors (see below), whose sum is σ = 5543952. Its totient is φ = 2771972.

The previous prime is 4157947. The next prime is 4157981. The reversal of 4157961 is 1697514.

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 4157961 - 2⁵ = 4157929 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (4157981) 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, 692991 + ... + 692996.

It is an arithmetic number, because the mean of its divisors is an integer number (1385988).

Almost surely, 2^4157961 is an apocalyptic number.

It is an amenable number.

4157961 is a deficient number, since it is larger than the sum of its proper divisors (1385991).

4157961 is a wasteful number, since it uses less digits than its factorization.

4157961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385990.

The product of its digits is 7560, while the sum is 33.

The square root of 4157961 is about 2039.1078931729. The cubic root of 4157961 is about 160.8027495755.

The spelling of 4157961 in words is "four million, one hundred fifty-seven thousand, nine hundred sixty-one".