1269450000 has 720 divisors, whose sum is σ = 5641638912. Its totient is φ = 259200000.

The previous prime is 1269449989. The next prime is 1269450001. The reversal of 1269450000 is 549621.

It is a tau number, because it is divible by the number of its divisors (720).

It is a super-2 number, since 2×1269450000² = 3223006605000000000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1269450001) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 40949985 + ... + 40950015.

Almost surely, 2^1269450000 is an apocalyptic number.

1269450000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1269450000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2820819456).

1269450000 is an abundant number, since it is smaller than the sum of its proper divisors (4372188912).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1269450000 is a wasteful number, since it uses less digits than its factorization.

1269450000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 61 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1269450000 is about 35629.3418406796. The cubic root of 1269450000 is about 1082.7757814738.

Adding to 1269450000 its reverse (549621), we get a palindrome (1269999621).

The spelling of 1269450000 in words is "one billion, two hundred sixty-nine million, four hundred fifty thousand".