1228501291 has 8 divisors (see below), whose sum is σ = 1246329344. Its totient is φ = 1210786920.

The previous prime is 1228501273. The next prime is 1228501303. The reversal of 1228501291 is 1921058221.

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 1228501291 - 2¹⁵ = 1228468523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1228501091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6531 + ... + 49996.

It is an arithmetic number, because the mean of its divisors is an integer number (155791168).

Almost surely, 2^1228501291 is an apocalyptic number.

1228501291 is a deficient number, since it is larger than the sum of its proper divisors (17828053).

1228501291 is a wasteful number, since it uses less digits than its factorization.

1228501291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56841.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 1228501291 is about 35049.9827532055. The cubic root of 1228501291 is about 1071.0059224524.

The spelling of 1228501291 in words is "one billion, two hundred twenty-eight million, five hundred one thousand, two hundred ninety-one".