1071621051 has 16 divisors (see below), whose sum is σ = 1492700160. Its totient is φ = 683033760.

The previous prime is 1071621043. The next prime is 1071621053. The reversal of 1071621051 is 1501261701.

It is not a de Polignac number, because 1071621051 - 2³ = 1071621043 is a prime.

It is a super-2 number, since 2×1071621051² = 2296743353892689202, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1071621053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61696 + ... + 77133.

It is an arithmetic number, because the mean of its divisors is an integer number (93293760).

Almost surely, 2^1071621051 is an apocalyptic number.

1071621051 is a deficient number, since it is larger than the sum of its proper divisors (421079109).

1071621051 is a wasteful number, since it uses less digits than its factorization.

1071621051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138946.

The product of its (nonzero) digits is 420, while the sum is 24.

The square root of 1071621051 is about 32735.6235773813. The cubic root of 1071621051 is about 1023.3253800719.

Adding to 1071621051 its reverse (1501261701), we get a palindrome (2572882752).

The spelling of 1071621051 in words is "one billion, seventy-one million, six hundred twenty-one thousand, fifty-one".