64254749 has 16 divisors (see below), whose sum is σ = 73347120. Its totient is φ = 55856640.

The previous prime is 64254731. The next prime is 64254767. The reversal of 64254749 is 94745246.

It is an interprime number because it is at equal distance from previous prime (64254731) and next prime (64254767).

It can be written as a sum of positive squares in 8 ways, for example, as 14100025 + 50154724 = 3755^2 + 7082^2 .

It is a cyclic number.

It is not a de Polignac number, because 64254749 - 2⁸ = 64254493 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64254769) 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, 13379 + ... + 17535.

It is an arithmetic number, because the mean of its divisors is an integer number (4584195).

Almost surely, 2^64254749 is an apocalyptic number.

It is an amenable number.

64254749 is a deficient number, since it is larger than the sum of its proper divisors (9092371).

64254749 is a wasteful number, since it uses less digits than its factorization.

64254749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4240.

The product of its digits is 241920, while the sum is 41.

The square root of 64254749 is about 8015.9059999479. The cubic root of 64254749 is about 400.5300244583.

The spelling of 64254749 in words is "sixty-four million, two hundred fifty-four thousand, seven hundred forty-nine".