1209021126 has 32 divisors (see below), whose sum is σ = 2444260320. Its totient is φ = 398651904.

The previous prime is 1209021071. The next prime is 1209021131. The reversal of 1209021126 is 6211209021.

It is a super-2 number, since 2×1209021126² = 2923464166228615752, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1209021096 and 1209021105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 414160 + ... + 417068.

It is an arithmetic number, because the mean of its divisors is an integer number (76383135).

Almost surely, 2^1209021126 is an apocalyptic number.

1209021126 is an abundant number, since it is smaller than the sum of its proper divisors (1235239194).

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

1209021126 is a wasteful number, since it uses less digits than its factorization.

1209021126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3640.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 1209021126 is about 34770.9810905588. The cubic root of 1209021126 is about 1065.3148065373.

The spelling of 1209021126 in words is "one billion, two hundred nine million, twenty-one thousand, one hundred twenty-six".