1299421269 has 12 divisors (see below), whose sum is σ = 1879222176. Its totient is φ = 865228392.

The previous prime is 1299421261. The next prime is 1299421283. The reversal of 1299421269 is 9621249921.

It is not a de Polignac number, because 1299421269 - 2³ = 1299421261 is a prime.

It is a super-2 number, since 2×1299421269² = 3376991268659140722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299421261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79849 + ... + 94734.

It is an arithmetic number, because the mean of its divisors is an integer number (156601848).

Almost surely, 2^1299421269 is an apocalyptic number.

It is an amenable number.

1299421269 is a deficient number, since it is larger than the sum of its proper divisors (579800907).

1299421269 is a wasteful number, since it uses less digits than its factorization.

1299421269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175416 (or 175413 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 1299421269 is about 36047.4863062600. The cubic root of 1299421269 is about 1091.2309044339.

The spelling of 1299421269 in words is "one billion, two hundred ninety-nine million, four hundred twenty-one thousand, two hundred sixty-nine".