4015397 has 4 divisors (see below), whose sum is σ = 4019520. Its totient is φ = 4011276.

The previous prime is 4015381. The next prime is 4015411. The reversal of 4015397 is 7935104.

4015397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 4015397 - 2⁴ = 4015381 is a prime.

It is a super-2 number, since 2×4015397² = 32246826135218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4015307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308 + ... + 2850.

It is an arithmetic number, because the mean of its divisors is an integer number (1004880).

Almost surely, 2^4015397 is an apocalyptic number.

It is an amenable number.

4015397 is a deficient number, since it is larger than the sum of its proper divisors (4123).

4015397 is a wasteful number, since it uses less digits than its factorization.

4015397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4122.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 4015397 is about 2003.8455529307. The cubic root of 4015397 is about 158.9435212033.

The spelling of 4015397 in words is "four million, fifteen thousand, three hundred ninety-seven".