1229904901 has 8 divisors (see below), whose sum is σ = 1263940344. Its totient is φ = 1195911360.

The previous prime is 1229904889. The next prime is 1229904913. The reversal of 1229904901 is 1094099221.

It is a Cunningham number, because it is equal to 35070²+1.

It is an interprime number because it is at equal distance from previous prime (1229904889) and next prime (1229904913).

It can be written as a sum of positive squares in 4 ways, for example, as 546343876 + 683561025 = 23374^2 + 26145^2 .

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 1229904901 - 2⁵ = 1229904869 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1229904931) 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, 54531 + ... + 73711.

It is an arithmetic number, because the mean of its divisors is an integer number (157992543).

Almost surely, 2^1229904901 is an apocalyptic number.

It is an amenable number.

1229904901 is a deficient number, since it is larger than the sum of its proper divisors (34035443).

1229904901 is a wasteful number, since it uses less digits than its factorization.

1229904901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20951.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 1229904901 is about 35070.0000142572. Note that the first 4 decimals coincide. The cubic root of 1229904901 is about 1071.4136557018.

The spelling of 1229904901 in words is "one billion, two hundred twenty-nine million, nine hundred four thousand, nine hundred one".