1211039954 has 16 divisors (see below), whose sum is σ = 1847660760. Its totient is φ = 595167360.

The previous prime is 1211039899. The next prime is 1211039957. The reversal of 1211039954 is 4599301121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1082739025 + 128300929 = 32905^2 + 11327^2 .

It is not an unprimeable number, because it can be changed into a prime (1211039957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 230792 + ... + 235980.

Almost surely, 2^1211039954 is an apocalyptic number.

1211039954 is a deficient number, since it is larger than the sum of its proper divisors (636620806).

1211039954 is a wasteful number, since it uses less digits than its factorization.

1211039954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7165.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 1211039954 is about 34799.9993390805. Note that the first 3 decimals coincide. The cubic root of 1211039954 is about 1065.9074323533.

The spelling of 1211039954 in words is "one billion, two hundred eleven million, thirty-nine thousand, nine hundred fifty-four".