1397241871 has 8 divisors (see below), whose sum is σ = 1434836304. Its totient is φ = 1359879360.

The previous prime is 1397241869. The next prime is 1397241887. The reversal of 1397241871 is 1781427931.

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

It is a cyclic number.

It is not a de Polignac number, because 1397241871 - 2¹ = 1397241869 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397241821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45736 + ... + 69901.

It is an arithmetic number, because the mean of its divisors is an integer number (179354538).

Almost surely, 2^1397241871 is an apocalyptic number.

1397241871 is a deficient number, since it is larger than the sum of its proper divisors (37594433).

1397241871 is a wasteful number, since it uses less digits than its factorization.

1397241871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115961.

The product of its digits is 84672, while the sum is 43.

The square root of 1397241871 is about 37379.6986477954. The cubic root of 1397241871 is about 1117.9538190181.

The spelling of 1397241871 in words is "one billion, three hundred ninety-seven million, two hundred forty-one thousand, eight hundred seventy-one".