11401555 has 8 divisors (see below), whose sum is σ = 14925744. Its totient is φ = 8292000.

The previous prime is 11401549. The next prime is 11401561. The reversal of 11401555 is 55510411.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11401549) and next prime (11401561).

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

It is not a de Polignac number, because 11401555 - 2⁷ = 11401427 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103596 + ... + 103705.

It is an arithmetic number, because the mean of its divisors is an integer number (1865718).

Almost surely, 2^11401555 is an apocalyptic number.

11401555 is a deficient number, since it is larger than the sum of its proper divisors (3524189).

11401555 is a wasteful number, since it uses less digits than its factorization.

11401555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207317.

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 11401555 is about 3376.6188710010. The cubic root of 11401555 is about 225.0719440715.

Adding to 11401555 its reverse (55510411), we get a palindrome (66911966).

The spelling of 11401555 in words is "eleven million, four hundred one thousand, five hundred fifty-five".