75120405 has 16 divisors (see below), whose sum is σ = 123125184. Its totient is φ = 39086720.

The previous prime is 75120403. The next prime is 75120407. The reversal of 75120405 is 50402157.

It is an interprime number because it is at equal distance from previous prime (75120403) and next prime (75120407).

It is not a de Polignac number, because 75120405 - 2¹ = 75120403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75120403) 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, 60459 + ... + 61688.

It is an arithmetic number, because the mean of its divisors is an integer number (7695324).

Almost surely, 2^75120405 is an apocalyptic number.

It is an amenable number.

75120405 is a deficient number, since it is larger than the sum of its proper divisors (48004779).

75120405 is a wasteful number, since it uses less digits than its factorization.

75120405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122196.

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 75120405 is about 8667.2028359789. The cubic root of 75120405 is about 421.9418864594.

The spelling of 75120405 in words is "seventy-five million, one hundred twenty thousand, four hundred five".