42450661 has 4 divisors (see below), whose sum is σ = 46309824. Its totient is φ = 38591500.

The previous prime is 42450659. The next prime is 42450671. The reversal of 42450661 is 16605424.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42450661 - 2¹ = 42450659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42450601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1929565 + ... + 1929586.

It is an arithmetic number, because the mean of its divisors is an integer number (11577456).

Almost surely, 2^42450661 is an apocalyptic number.

It is an amenable number.

42450661 is a deficient number, since it is larger than the sum of its proper divisors (3859163).

42450661 is a wasteful number, since it uses less digits than its factorization.

42450661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3859162.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 42450661 is about 6515.4171777408. The cubic root of 42450661 is about 348.8415056879.

The spelling of 42450661 in words is "forty-two million, four hundred fifty thousand, six hundred sixty-one".