291442401 has 16 divisors (see below), whose sum is σ = 433382400. Its totient is φ = 193567824.

The previous prime is 291442367. The next prime is 291442409. The reversal of 291442401 is 104244192.

It is a happy number.

It is not a de Polignac number, because 291442401 - 2⁹ = 291441889 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (291442409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12801 + ... + 27326.

It is an arithmetic number, because the mean of its divisors is an integer number (27086400).

Almost surely, 2^291442401 is an apocalyptic number.

It is an amenable number.

291442401 is a deficient number, since it is larger than the sum of its proper divisors (141939999).

291442401 is a wasteful number, since it uses less digits than its factorization.

291442401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40405 (or 40399 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 291442401 is about 17071.6841875663. The cubic root of 291442401 is about 663.0061832719.

Adding to 291442401 its reverse (104244192), we get a palindrome (395686593).

The spelling of 291442401 in words is "two hundred ninety-one million, four hundred forty-two thousand, four hundred one".