1272617045 has 16 divisors (see below), whose sum is σ = 1754172288. Its totient is φ = 868217280.

The previous prime is 1272617039. The next prime is 1272617051. The reversal of 1272617045 is 5407162721.

It is an interprime number because it is at equal distance from previous prime (1272617039) and next prime (1272617051).

It is not a de Polignac number, because 1272617045 - 2¹⁴ = 1272600661 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1272616996 and 1272617014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85391 + ... + 99180.

It is an arithmetic number, because the mean of its divisors is an integer number (109635768).

Almost surely, 2^1272617045 is an apocalyptic number.

It is an amenable number.

1272617045 is a deficient number, since it is larger than the sum of its proper divisors (481555243).

1272617045 is a wasteful number, since it uses less digits than its factorization.

1272617045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184780.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 1272617045 is about 35673.7584927633. The cubic root of 1272617045 is about 1083.6754760474.

Adding to 1272617045 its reverse (5407162721), we get a palindrome (6679779766).

The spelling of 1272617045 in words is "one billion, two hundred seventy-two million, six hundred seventeen thousand, forty-five".