42077961 has 20 divisors (see below), whose sum is σ = 63262672. Its totient is φ = 27871128.

The previous prime is 42077957. The next prime is 42077977. The reversal of 42077961 is 16977024.

It is a happy number.

It is not a de Polignac number, because 42077961 - 2² = 42077957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42077911) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11610 + ... + 14796.

Almost surely, 2^42077961 is an apocalyptic number.

It is an amenable number.

42077961 is a deficient number, since it is larger than the sum of its proper divisors (21184711).

42077961 is a wasteful number, since it uses less digits than its factorization.

42077961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3362 (or 3353 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 42077961 is about 6486.7527315291. The cubic root of 42077961 is about 347.8176065611.

The spelling of 42077961 in words is "forty-two million, seventy-seven thousand, nine hundred sixty-one".