1226990451 has 8 divisors (see below), whose sum is σ = 1638069184. Its totient is φ = 816952680.

The previous prime is 1226990449. The next prime is 1226990461. The reversal of 1226990451 is 1540996221.

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

It is not a de Polignac number, because 1226990451 - 2¹ = 1226990449 is a prime.

It is a super-3 number, since 3×1226990451³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1226990431) 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, 257485 + ... + 262206.

It is an arithmetic number, because the mean of its divisors is an integer number (204758648).

Almost surely, 2^1226990451 is an apocalyptic number.

1226990451 is a deficient number, since it is larger than the sum of its proper divisors (411078733).

1226990451 is an equidigital number, since it uses as much as digits as its factorization.

1226990451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520481.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 1226990451 is about 35028.4234729455. The cubic root of 1226990451 is about 1070.5666928570.

The spelling of 1226990451 in words is "one billion, two hundred twenty-six million, nine hundred ninety thousand, four hundred fifty-one".