721054761 has 32 divisors (see below), whose sum is σ = 1183531008. Its totient is φ = 381395520.

The previous prime is 721054673. The next prime is 721054837. The reversal of 721054761 is 167450127.

It is not a de Polignac number, because 721054761 - 2¹³ = 721046569 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (721054561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9106 + ... + 39051.

It is an arithmetic number, because the mean of its divisors is an integer number (36985344).

Almost surely, 2^721054761 is an apocalyptic number.

It is an amenable number.

721054761 is a deficient number, since it is larger than the sum of its proper divisors (462476247).

721054761 is a wasteful number, since it uses less digits than its factorization.

721054761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48221.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 721054761 is about 26852.4628479400. The cubic root of 721054761 is about 896.7184034461.

The spelling of 721054761 in words is "seven hundred twenty-one million, fifty-four thousand, seven hundred sixty-one".