610421261 has 8 divisors (see below), whose sum is σ = 668616120. Its totient is φ = 554702848.

The previous prime is 610421237. The next prime is 610421297. The reversal of 610421261 is 162124016.

It can be written as a sum of positive squares in 4 ways, for example, as 21436900 + 588984361 = 4630^2 + 24269^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 610421261 - 2¹⁴ = 610404877 is a prime.

It is a super-2 number, since 2×610421261² = 745228231761660242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (610421221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 618596 + ... + 619581.

It is an arithmetic number, because the mean of its divisors is an integer number (83577015).

Almost surely, 2^610421261 is an apocalyptic number.

It is an amenable number.

610421261 is a deficient number, since it is larger than the sum of its proper divisors (58194859).

610421261 is a wasteful number, since it uses less digits than its factorization.

610421261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238223.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 610421261 is about 24706.7047782581. The cubic root of 610421261 is about 848.2877925263.

Adding to 610421261 its reverse (162124016), we get a palindrome (772545277).

The spelling of 610421261 in words is "six hundred ten million, four hundred twenty-one thousand, two hundred sixty-one".