1071345639 has 16 divisors (see below), whose sum is σ = 1758106112. Its totient is φ = 565105248.

The previous prime is 1071345629. The next prime is 1071345673. The reversal of 1071345639 is 9365431701.

It is not a de Polignac number, because 1071345639 - 2⁷ = 1071345511 is a prime.

It is a super-2 number, since 2×1071345639² = 2295562956408636642, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 1071345597 and 1071345606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1071345629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1961899 + ... + 1962444.

It is an arithmetic number, because the mean of its divisors is an integer number (109881632).

Almost surely, 2^1071345639 is an apocalyptic number.

1071345639 is a deficient number, since it is larger than the sum of its proper divisors (686760473).

1071345639 is a wasteful number, since it uses less digits than its factorization.

1071345639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3924366.

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 1071345639 is about 32731.4166971123. The cubic root of 1071345639 is about 1023.2377059707.

The spelling of 1071345639 in words is "one billion, seventy-one million, three hundred forty-five thousand, six hundred thirty-nine".