1262428409 has 4 divisors (see below), whose sum is σ = 1377194640. Its totient is φ = 1147662180.

The previous prime is 1262428397. The next prime is 1262428459. The reversal of 1262428409 is 9048242621.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 1262428409 - 2²⁸ = 993992953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1262428459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57383099 + ... + 57383120.

It is an arithmetic number, because the mean of its divisors is an integer number (344298660).

Almost surely, 2^1262428409 is an apocalyptic number.

It is an amenable number.

1262428409 is a deficient number, since it is larger than the sum of its proper divisors (114766231).

1262428409 is a wasteful number, since it uses less digits than its factorization.

1262428409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114766230.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 1262428409 is about 35530.6685695611. The cubic root of 1262428409 is about 1080.7757369700.

The spelling of 1262428409 in words is "one billion, two hundred sixty-two million, four hundred twenty-eight thousand, four hundred nine".