75987421 has 8 divisors (see below), whose sum is σ = 76608000. Its totient is φ = 75369840.

The previous prime is 75987409. The next prime is 75987449. The reversal of 75987421 is 12478957.

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 75987421 - 2¹¹ = 75985373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75987491) 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, 82956 + ... + 83866.

It is an arithmetic number, because the mean of its divisors is an integer number (9576000).

Almost surely, 2^75987421 is an apocalyptic number.

It is an amenable number.

75987421 is a deficient number, since it is larger than the sum of its proper divisors (620579).

75987421 is a wasteful number, since it uses less digits than its factorization.

75987421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1499.

The product of its digits is 141120, while the sum is 43.

The square root of 75987421 is about 8717.0764020972. The cubic root of 75987421 is about 423.5589876515.

The spelling of 75987421 in words is "seventy-five million, nine hundred eighty-seven thousand, four hundred twenty-one".