761421491 has 8 divisors (see below), whose sum is σ = 774794160. Its totient is φ = 748064512.

The previous prime is 761421487. The next prime is 761421539. The reversal of 761421491 is 194124167.

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 761421491 - 2² = 761421487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (761421421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138491 + ... + 143883.

It is an arithmetic number, because the mean of its divisors is an integer number (96849270).

Almost surely, 2^761421491 is an apocalyptic number.

761421491 is a deficient number, since it is larger than the sum of its proper divisors (13372669).

761421491 is a wasteful number, since it uses less digits than its factorization.

761421491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7845.

The product of its digits is 12096, while the sum is 35.

The square root of 761421491 is about 27593.8669091521. The cubic root of 761421491 is about 913.1491310582.

The spelling of 761421491 in words is "seven hundred sixty-one million, four hundred twenty-one thousand, four hundred ninety-one".