1061621143 has 32 divisors (see below), whose sum is σ = 1278374400. Its totient is φ = 870249600.

The previous prime is 1061621123. The next prime is 1061621149. The reversal of 1061621143 is 3411261601.

It is a de Polignac number, because none of the positive numbers 2^k-1061621143 is a prime.

It is a super-2 number, since 2×1061621143² = 2254078902529252898, 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 (1061621149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1292673 + ... + 1293493.

It is an arithmetic number, because the mean of its divisors is an integer number (39949200).

Almost surely, 2^1061621143 is an apocalyptic number.

1061621143 is a deficient number, since it is larger than the sum of its proper divisors (216753257).

1061621143 is a wasteful number, since it uses less digits than its factorization.

1061621143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1143.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1061621143 is about 32582.5281861307. The cubic root of 1061621143 is about 1020.1323495442.

Adding to 1061621143 its reverse (3411261601), we get a palindrome (4472882744).

The spelling of 1061621143 in words is "one billion, sixty-one million, six hundred twenty-one thousand, one hundred forty-three".