1226154381 has 8 divisors (see below), whose sum is σ = 1635332544. Its totient is φ = 817206240.

The previous prime is 1226154329. The next prime is 1226154463. The reversal of 1226154381 is 1834516221.

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

It is not a de Polignac number, because 1226154381 - 2⁶ = 1226154317 is a prime.

It is a super-2 number, since 2×1226154381² = 3006909132090986322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226154301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44656 + ... + 66681.

It is an arithmetic number, because the mean of its divisors is an integer number (204416568).

Almost surely, 2^1226154381 is an apocalyptic number.

It is an amenable number.

1226154381 is a deficient number, since it is larger than the sum of its proper divisors (409178163).

1226154381 is a wasteful number, since it uses less digits than its factorization.

1226154381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115011.

The product of its digits is 11520, while the sum is 33.

The square root of 1226154381 is about 35016.4872738543. The cubic root of 1226154381 is about 1070.3234766009.

The spelling of 1226154381 in words is "one billion, two hundred twenty-six million, one hundred fifty-four thousand, three hundred eighty-one".