1072865887 has 4 divisors (see below), whose sum is σ = 1107474496. Its totient is φ = 1038257280.

The previous prime is 1072865873. The next prime is 1072865921. The reversal of 1072865887 is 7885682701.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1072865887 is a prime.

It is a super-2 number, since 2×1072865887² = 2302082422976593538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1072805887) 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, 17304258 + ... + 17304319.

It is an arithmetic number, because the mean of its divisors is an integer number (276868624).

Almost surely, 2^1072865887 is an apocalyptic number.

1072865887 is a deficient number, since it is larger than the sum of its proper divisors (34608609).

1072865887 is an equidigital number, since it uses as much as digits as its factorization.

1072865887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34608608.

The product of its (nonzero) digits is 1505280, while the sum is 52.

The square root of 1072865887 is about 32754.6315350974. The cubic root of 1072865887 is about 1023.7214713737.

The spelling of 1072865887 in words is "one billion, seventy-two million, eight hundred sixty-five thousand, eight hundred eighty-seven".