11401591 has 8 divisors (see below), whose sum is σ = 11652480. Its totient is φ = 11153208.

The previous prime is 11401561. The next prime is 11401601. The reversal of 11401591 is 19510411.

11401591 = 1376² + 1377² + ... + 1381².

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 11401591 - 2⁹ = 11401079 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 (11401561) 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 7 ways as a sum of consecutive naturals, for example, 10680 + ... + 11698.

It is an arithmetic number, because the mean of its divisors is an integer number (1456560).

Almost surely, 2^11401591 is an apocalyptic number.

11401591 is a deficient number, since it is larger than the sum of its proper divisors (250889).

11401591 is a wasteful number, since it uses less digits than its factorization.

11401591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253.

The product of its (nonzero) digits is 180, while the sum is 22.

The square root of 11401591 is about 3376.6242017731. The cubic root of 11401591 is about 225.0721809568.

The spelling of 11401591 in words is "eleven million, four hundred one thousand, five hundred ninety-one".