1061640123 has 16 divisors (see below), whose sum is σ = 1508343840. Its totient is φ = 661879296.

The previous prime is 1061640121. The next prime is 1061640179. The reversal of 1061640123 is 3210461601.

It is not a de Polignac number, because 1061640123 - 2¹ = 1061640121 is a prime.

It is a super-2 number, since 2×1061640123² = 2254159501526910258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1061640093 and 1061640102.

It is not an unprimeable number, because it can be changed into a prime (1061640121) 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, 58288 + ... + 74301.

It is an arithmetic number, because the mean of its divisors is an integer number (94271490).

Almost surely, 2^1061640123 is an apocalyptic number.

1061640123 is a deficient number, since it is larger than the sum of its proper divisors (446703717).

1061640123 is a wasteful number, since it uses less digits than its factorization.

1061640123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132766.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1061640123 is about 32582.8194452230. The cubic root of 1061640123 is about 1020.1384289247.

The spelling of 1061640123 in words is "one billion, sixty-one million, six hundred forty thousand, one hundred twenty-three".