1661058 has 24 divisors (see below), whose sum is σ = 4113408. Its totient is φ = 474552.

The previous prime is 1661029. The next prime is 1661059. The reversal of 1661058 is 8501661.

It is a super-2 number, since 2×1661058² = 5518227358728, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1661059) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6466 + ... + 6717.

It is an arithmetic number, because the mean of its divisors is an integer number (171392).

2^1661058 is an apocalyptic number.

1661058 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1661058 is an abundant number, since it is smaller than the sum of its proper divisors (2452350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1661058 is a wasteful number, since it uses less digits than its factorization.

1661058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13198 (or 13195 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1661058 is about 1288.8203909001. The cubic root of 1661058 is about 118.4299644911.

The spelling of 1661058 in words is "one million, six hundred sixty-one thousand, fifty-eight".