1030406261 has 4 divisors (see below), whose sum is σ = 1091018412. Its totient is φ = 969794112.

The previous prime is 1030406257. The next prime is 1030406263. The reversal of 1030406261 is 1626040301.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 602702500 + 427703761 = 24550^2 + 20681^2 .

It is a cyclic number.

It is not a de Polignac number, because 1030406261 - 2² = 1030406257 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1030406263) 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, 30306050 + ... + 30306083.

It is an arithmetic number, because the mean of its divisors is an integer number (272754603).

Almost surely, 2^1030406261 is an apocalyptic number.

It is an amenable number.

1030406261 is a deficient number, since it is larger than the sum of its proper divisors (60612151).

1030406261 is an equidigital number, since it uses as much as digits as its factorization.

1030406261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60612150.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1030406261 is about 32099.9417600718. The cubic root of 1030406261 is about 1010.0343944762.

Adding to 1030406261 its reverse (1626040301), we get a palindrome (2656446562).

The spelling of 1030406261 in words is "one billion, thirty million, four hundred six thousand, two hundred sixty-one".