1292772851 has 4 divisors (see below), whose sum is σ = 1292870112. Its totient is φ = 1292675592.

The previous prime is 1292772847. The next prime is 1292772883. The reversal of 1292772851 is 1582772921.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1582772921 = 31 ⋅51057191.

It is a cyclic number.

It is not a de Polignac number, because 1292772851 - 2² = 1292772847 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1292732851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24800 + ... + 56573.

It is an arithmetic number, because the mean of its divisors is an integer number (323217528).

Almost surely, 2^1292772851 is an apocalyptic number.

1292772851 is a deficient number, since it is larger than the sum of its proper divisors (97261).

1292772851 is an equidigital number, since it uses as much as digits as its factorization.

1292772851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97260.

The product of its digits is 141120, while the sum is 44.

The square root of 1292772851 is about 35955.1505489825. The cubic root of 1292772851 is about 1089.3666468981.

The spelling of 1292772851 in words is "one billion, two hundred ninety-two million, seven hundred seventy-two thousand, eight hundred fifty-one".