1210995153 has 24 divisors (see below), whose sum is σ = 1949594400. Its totient is φ = 719846784.

The previous prime is 1210995139. The next prime is 1210995157. The reversal of 1210995153 is 3515990121.

It is not a de Polignac number, because 1210995153 - 2⁹ = 1210994641 is a prime.

It is a super-3 number, since 3×1210995153³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1210995157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 205383 + ... + 211196.

It is an arithmetic number, because the mean of its divisors is an integer number (81233100).

Almost surely, 2^1210995153 is an apocalyptic number.

It is an amenable number.

1210995153 is a deficient number, since it is larger than the sum of its proper divisors (738599247).

1210995153 is a wasteful number, since it uses less digits than its factorization.

1210995153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416621 (or 416618 counting only the distinct ones).

The product of its (nonzero) digits is 12150, while the sum is 36.

The square root of 1210995153 is about 34799.3556405862. The cubic root of 1210995153 is about 1065.8942881936.

The spelling of 1210995153 in words is "one billion, two hundred ten million, nine hundred ninety-five thousand, one hundred fifty-three".