4151997 has 6 divisors (see below), whose sum is σ = 5997342. Its totient is φ = 2767992.

The previous prime is 4151989. The next prime is 4152019. The reversal of 4151997 is 7991514.

It can be written as a sum of positive squares in only one way, i.e., 3663396 + 488601 = 1914^2 + 699^2 .

It is not a de Polignac number, because 4151997 - 2³ = 4151989 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4151977) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 230658 + ... + 230675.

It is an arithmetic number, because the mean of its divisors is an integer number (999557).

Almost surely, 2^4151997 is an apocalyptic number.

It is an amenable number.

4151997 is a deficient number, since it is larger than the sum of its proper divisors (1845345).

4151997 is a wasteful number, since it uses less digits than its factorization.

4151997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461339 (or 461336 counting only the distinct ones).

The product of its digits is 11340, while the sum is 36.

The square root of 4151997 is about 2037.6449641682. The cubic root of 4151997 is about 160.7258299432.

It can be divided in two parts, 41519 and 97, that added together give a triangular number (41616 = T₂₈₈).

The spelling of 4151997 in words is "four million, one hundred fifty-one thousand, nine hundred ninety-seven".