74121761 has 6 divisors (see below), whose sum is σ = 86223330. Its totient is φ = 63532896.

The previous prime is 74121757. The next prime is 74121811. The reversal of 74121761 is 16712147.

It can be written as a sum of positive squares in only one way, i.e., 45819361 + 28302400 = 6769^2 + 5320^2 .

It is not a de Polignac number, because 74121761 - 2² = 74121757 is a prime.

It is a super-2 number, since 2×74121761² = 10988070907482242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (74121701) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 756296 + ... + 756393.

It is an arithmetic number, because the mean of its divisors is an integer number (14370555).

Almost surely, 2^74121761 is an apocalyptic number.

It is an amenable number.

74121761 is a deficient number, since it is larger than the sum of its proper divisors (12101569).

74121761 is a wasteful number, since it uses less digits than its factorization.

74121761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1512703 (or 1512696 counting only the distinct ones).

The product of its digits is 2352, while the sum is 29.

The square root of 74121761 is about 8609.3995725602. The cubic root of 74121761 is about 420.0637866084.

The spelling of 74121761 in words is "seventy-four million, one hundred twenty-one thousand, seven hundred sixty-one".