1401284791 has 4 divisors (see below), whose sum is σ = 1401399112. Its totient is φ = 1401170472.

The previous prime is 1401284783. The next prime is 1401284813. The reversal of 1401284791 is 1974821041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1974821041 = 2273 ⋅868817.

It is a cyclic number.

It is not a de Polignac number, because 1401284791 - 2³ = 1401284783 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1401284791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401284701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36216 + ... + 64141.

It is an arithmetic number, because the mean of its divisors is an integer number (350349778).

Almost surely, 2^1401284791 is an apocalyptic number.

1401284791 is a deficient number, since it is larger than the sum of its proper divisors (114321).

1401284791 is a wasteful number, since it uses less digits than its factorization.

1401284791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114320.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 1401284791 is about 37433.7386724863. The cubic root of 1401284791 is about 1119.0310473291.

The spelling of 1401284791 in words is "one billion, four hundred one million, two hundred eighty-four thousand, seven hundred ninety-one".