64242261 has 16 divisors (see below), whose sum is σ = 98245120. Its totient is φ = 41446080.

The previous prime is 64242259. The next prime is 64242271. The reversal of 64242261 is 16224246.

It is not a de Polignac number, because 64242261 - 2¹ = 64242259 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64242251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37540 + ... + 39213.

It is an arithmetic number, because the mean of its divisors is an integer number (6140320).

Almost surely, 2^64242261 is an apocalyptic number.

It is an amenable number.

64242261 is a deficient number, since it is larger than the sum of its proper divisors (34002859).

64242261 is a wasteful number, since it uses less digits than its factorization.

64242261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76793 (or 76787 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 64242261 is about 8015.1270108464. The cubic root of 64242261 is about 400.5040749210.

The spelling of 64242261 in words is "sixty-four million, two hundred forty-two thousand, two hundred sixty-one".