1187122071 has 16 divisors (see below), whose sum is σ = 1682320640. Its totient is φ = 742478400.

The previous prime is 1187122063. The next prime is 1187122073. The reversal of 1187122071 is 1702217811.

It is not a de Polignac number, because 1187122071 - 2³ = 1187122063 is a prime.

It is a super-2 number, since 2×1187122071² = 2818517622910658082, 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 (1187122073) 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, 95230 + ... + 106971.

It is an arithmetic number, because the mean of its divisors is an integer number (105145040).

Almost surely, 2^1187122071 is an apocalyptic number.

1187122071 is a deficient number, since it is larger than the sum of its proper divisors (495198569).

1187122071 is a wasteful number, since it uses less digits than its factorization.

1187122071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202326.

The product of its (nonzero) digits is 1568, while the sum is 30.

The square root of 1187122071 is about 34454.6378735868. The cubic root of 1187122071 is about 1058.8435444548.

Adding to 1187122071 its reverse (1702217811), we get a palindrome (2889339882).

The spelling of 1187122071 in words is "one billion, one hundred eighty-seven million, one hundred twenty-two thousand, seventy-one".