7142245561 has 16 divisors (see below), whose sum is σ = 7837175808. Its totient is φ = 6455005200.

The previous prime is 7142245549. The next prime is 7142245567. The reversal of 7142245561 is 1655422417.

It is a cyclic number.

It is not a de Polignac number, because 7142245561 - 2⁵ = 7142245529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7142245561.

It is not an unprimeable number, because it can be changed into a prime (7142245567) 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, 2370546 + ... + 2373556.

It is an arithmetic number, because the mean of its divisors is an integer number (489823488).

Almost surely, 2^7142245561 is an apocalyptic number.

It is an amenable number.

7142245561 is a deficient number, since it is larger than the sum of its proper divisors (694930247).

7142245561 is a wasteful number, since it uses less digits than its factorization.

7142245561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4212.

The product of its digits is 67200, while the sum is 37.

The square root of 7142245561 is about 84511.8072283394. The cubic root of 7142245561 is about 1925.8018190955.

Adding to 7142245561 its reverse (1655422417), we get a palindrome (8797667978).

The spelling of 7142245561 in words is "seven billion, one hundred forty-two million, two hundred forty-five thousand, five hundred sixty-one".