1017025661 has 16 divisors (see below), whose sum is σ = 1076924160. Its totient is φ = 958531200.

The previous prime is 1017025631. The next prime is 1017025687. The reversal of 1017025661 is 1665207101.

It is a cyclic number.

It is not a de Polignac number, because 1017025661 - 2¹⁰ = 1017024637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1017025601) 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, 540320 + ... + 542198.

It is an arithmetic number, because the mean of its divisors is an integer number (67307760).

Almost surely, 2^1017025661 is an apocalyptic number.

It is an amenable number.

1017025661 is a deficient number, since it is larger than the sum of its proper divisors (59898499).

1017025661 is a wasteful number, since it uses less digits than its factorization.

1017025661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2236.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 1017025661 is about 31890.8397663028. The cubic root of 1017025661 is about 1005.6433134393.

The spelling of 1017025661 in words is "one billion, seventeen million, twenty-five thousand, six hundred sixty-one".