1226721354 has 16 divisors (see below), whose sum is σ = 2481010560. Its totient is φ = 404312480.

The previous prime is 1226721319. The next prime is 1226721359. The reversal of 1226721354 is 4531276221.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1226721359) 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, 1148082 + ... + 1149149.

It is an arithmetic number, because the mean of its divisors is an integer number (155063160).

Almost surely, 2^1226721354 is an apocalyptic number.

1226721354 is an abundant number, since it is smaller than the sum of its proper divisors (1254289206).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1226721354 is a wasteful number, since it uses less digits than its factorization.

1226721354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2297325.

The product of its digits is 20160, while the sum is 33.

The square root of 1226721354 is about 35024.5821388350. The cubic root of 1226721354 is about 1070.4884234763.

Adding to 1226721354 its reverse (4531276221), we get a palindrome (5757997575).

The spelling of 1226721354 in words is "one billion, two hundred twenty-six million, seven hundred twenty-one thousand, three hundred fifty-four".