72694261 has 8 divisors (see below), whose sum is σ = 77065560. Its totient is φ = 68333568.

The previous prime is 72694231. The next prime is 72694267. The reversal of 72694261 is 16249627.

It can be written as a sum of positive squares in 4 ways, for example, as 52272900 + 20421361 = 7230^2 + 4519^2 .

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 72694261 - 2¹³ = 72686069 is a prime.

It is a super-2 number, since 2×72694261² = 10568911164672242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72694261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72694267) 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, 14805 + ... + 19093.

It is an arithmetic number, because the mean of its divisors is an integer number (9633195).

Almost surely, 2^72694261 is an apocalyptic number.

It is an amenable number.

72694261 is a deficient number, since it is larger than the sum of its proper divisors (4371299).

72694261 is a wasteful number, since it uses less digits than its factorization.

72694261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5303.

The product of its digits is 36288, while the sum is 37.

The square root of 72694261 is about 8526.0929504668. The cubic root of 72694261 is about 417.3496388039.

It can be divided in two parts, 726 and 94261, that multiplied together give a palindrome (68433486).

The spelling of 72694261 in words is "seventy-two million, six hundred ninety-four thousand, two hundred sixty-one".