69742621 has 8 divisors (see below), whose sum is σ = 75852504. Its totient is φ = 63739200.

The previous prime is 69742549. The next prime is 69742627. The reversal of 69742621 is 12624796.

It can be written as a sum of positive squares in 4 ways, for example, as 33802596 + 35940025 = 5814^2 + 5995^2 .

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 69742621 - 2¹⁵ = 69709853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69742627) 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, 25246 + ... + 27871.

It is an arithmetic number, because the mean of its divisors is an integer number (9481563).

Almost surely, 2^69742621 is an apocalyptic number.

It is an amenable number.

69742621 is a deficient number, since it is larger than the sum of its proper divisors (6109883).

69742621 is a wasteful number, since it uses less digits than its factorization.

69742621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53231.

The product of its digits is 36288, while the sum is 37.

The square root of 69742621 is about 8351.2047633859. The cubic root of 69742621 is about 411.6227990285.

The spelling of 69742621 in words is "sixty-nine million, seven hundred forty-two thousand, six hundred twenty-one".