742697505 has 80 divisors (see below), whose sum is σ = 1486545984. Its totient is φ = 351630720.

The previous prime is 742697489. The next prime is 742697507. The reversal of 742697505 is 505796247.

It is not a de Polignac number, because 742697505 - 2⁴ = 742697489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (742697507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 189627 + ... + 193503.

Almost surely, 2^742697505 is an apocalyptic number.

It is an amenable number.

742697505 is an abundant number, since it is smaller than the sum of its proper divisors (743848479).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

742697505 is a wasteful number, since it uses less digits than its factorization.

742697505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3948 (or 3939 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 45.

The square root of 742697505 is about 27252.4770433808. The cubic root of 742697505 is about 905.6018929845.

The spelling of 742697505 in words is "seven hundred forty-two million, six hundred ninety-seven thousand, five hundred five".