34742421 has 18 divisors (see below), whose sum is σ = 58377462. Its totient is φ = 19852560.

The previous prime is 34742387. The next prime is 34742437. The reversal of 34742421 is 12424743.

It can be written as a sum of positive squares in only one way, i.e., 24147396 + 10595025 = 4914^2 + 3255^2 .

It is not a de Polignac number, because 34742421 - 2¹⁴ = 34726037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34742221) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 38950 + ... + 39831.

Almost surely, 2^34742421 is an apocalyptic number.

It is an amenable number.

34742421 is a deficient number, since it is larger than the sum of its proper divisors (23635041).

34742421 is a wasteful number, since it uses less digits than its factorization.

34742421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78801 (or 78791 counting only the distinct ones).

The product of its digits is 5376, while the sum is 27.

The square root of 34742421 is about 5894.2701838311. The cubic root of 34742421 is about 326.3022182679.

The spelling of 34742421 in words is "thirty-four million, seven hundred forty-two thousand, four hundred twenty-one".