1061551 has 4 divisors (see below), whose sum is σ = 1071400. Its totient is φ = 1051704.

The previous prime is 1061527. The next prime is 1061561. The reversal of 1061551 is 1551601.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1061551 - 2¹¹ = 1059503 is a prime.

It is a super-2 number, since 2×1061551² = 2253781051202, 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 (1061561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4761 + ... + 4978.

It is an arithmetic number, because the mean of its divisors is an integer number (267850).

2^1061551 is an apocalyptic number.

1061551 is a deficient number, since it is larger than the sum of its proper divisors (9849).

1061551 is an equidigital number, since it uses as much as digits as its factorization.

1061551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9848.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 1061551 is about 1030.3159709526. The cubic root of 1061551 is about 102.0109881793.

The spelling of 1061551 in words is "one million, sixty-one thousand, five hundred fifty-one".