416531261 has 4 divisors (see below), whose sum is σ = 416733312. Its totient is φ = 416329212.

The previous prime is 416531257. The next prime is 416531273. The reversal of 416531261 is 162135614.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 162135614 = 2 ⋅81067807.

It is a cyclic number.

It is not a de Polignac number, because 416531261 - 2² = 416531257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (416531251) 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, 97901 + ... + 102066.

It is an arithmetic number, because the mean of its divisors is an integer number (104183328).

Almost surely, 2^416531261 is an apocalyptic number.

It is an amenable number.

416531261 is a deficient number, since it is larger than the sum of its proper divisors (202051).

416531261 is a wasteful number, since it uses less digits than its factorization.

416531261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202050.

The product of its digits is 4320, while the sum is 29.

The square root of 416531261 is about 20409.0975057693. The cubic root of 416531261 is about 746.8198746474.

Adding to 416531261 its reverse (162135614), we get a palindrome (578666875).

The spelling of 416531261 in words is "four hundred sixteen million, five hundred thirty-one thousand, two hundred sixty-one".