1209949241 has 4 divisors (see below), whose sum is σ = 1273630800. Its totient is φ = 1146267684.

The previous prime is 1209949229. The next prime is 1209949249. The reversal of 1209949241 is 1429499021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1429499021 = 257 ⋅5562253.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1209949241 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1209949249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31840751 + ... + 31840788.

It is an arithmetic number, because the mean of its divisors is an integer number (318407700).

Almost surely, 2^1209949241 is an apocalyptic number.

It is an amenable number.

1209949241 is a deficient number, since it is larger than the sum of its proper divisors (63681559).

1209949241 is an equidigital number, since it uses as much as digits as its factorization.

1209949241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63681558.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 1209949241 is about 34784.3246448742. The cubic root of 1209949241 is about 1065.5873360337.

The spelling of 1209949241 in words is "one billion, two hundred nine million, nine hundred forty-nine thousand, two hundred forty-one".