64425261 has 8 divisors (see below), whose sum is σ = 86428000. Its totient is φ = 42686352.

The previous prime is 64425259. The next prime is 64425287. The reversal of 64425261 is 16252446.

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

It is not a de Polignac number, because 64425261 - 2¹ = 64425259 is a prime.

It is a super-2 number, since 2×64425261² = 8301228509836242, 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 (64425661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65386 + ... + 66363.

It is an arithmetic number, because the mean of its divisors is an integer number (10803500).

Almost surely, 2^64425261 is an apocalyptic number.

It is an amenable number.

64425261 is a deficient number, since it is larger than the sum of its proper divisors (22002739).

64425261 is a wasteful number, since it uses less digits than its factorization.

64425261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131915.

The product of its digits is 11520, while the sum is 30.

The square root of 64425261 is about 8026.5348065027. The cubic root of 64425261 is about 400.8840053140.

The spelling of 64425261 in words is "sixty-four million, four hundred twenty-five thousand, two hundred sixty-one".