1272695490 has 224 divisors, whose sum is σ = 3824625600. Its totient is φ = 302175360.

The previous prime is 1272695453. The next prime is 1272695491. The reversal of 1272695490 is 945962721.

1272695490 is a `hidden beast` number, since 1 + 2 + 72 + 6 + 95 + 490 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1272695491) 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 111 ways as a sum of consecutive naturals, for example, 4731076 + ... + 4731344.

Almost surely, 2^1272695490 is an apocalyptic number.

1272695490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1272695490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1912312800).

1272695490 is an abundant number, since it is smaller than the sum of its proper divisors (2551930110).

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

1272695490 is a wasteful number, since it uses less digits than its factorization.

1272695490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364 (or 349 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 1272695490 is about 35674.8579534663. The cubic root of 1272695490 is about 1083.6977417600.

The spelling of 1272695490 in words is "one billion, two hundred seventy-two million, six hundred ninety-five thousand, four hundred ninety".