1214017391 has 4 divisors (see below), whose sum is σ = 1214125992. Its totient is φ = 1213908792.

The previous prime is 1214017373. The next prime is 1214017429. The reversal of 1214017391 is 1937104121.

It is a semiprime because it is the product of two primes, 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 1214017391 - 2⁶ = 1214017327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1214017351) 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, 35321 + ... + 60626.

It is an arithmetic number, because the mean of its divisors is an integer number (303531498).

Almost surely, 2^1214017391 is an apocalyptic number.

1214017391 is a deficient number, since it is larger than the sum of its proper divisors (108601).

1214017391 is an equidigital number, since it uses as much as digits as its factorization.

1214017391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108600.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 1214017391 is about 34842.7523453587. The cubic root of 1214017391 is about 1066.7802565340.

The spelling of 1214017391 in words is "one billion, two hundred fourteen million, seventeen thousand, three hundred ninety-one".