126601961 has 4 divisors (see below), whose sum is σ = 126776832. Its totient is φ = 126427092.

The previous prime is 126601957. The next prime is 126601967. The reversal of 126601961 is 169106621.

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, and also an emirpimes, since its reverse is a distinct semiprime: 169106621 = 563 ⋅300367.

It is a cyclic number.

It is not a de Polignac number, because 126601961 - 2² = 126601957 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126601967) 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, 86345 + ... + 87798.

It is an arithmetic number, because the mean of its divisors is an integer number (31694208).

Almost surely, 2^126601961 is an apocalyptic number.

It is an amenable number.

126601961 is a deficient number, since it is larger than the sum of its proper divisors (174871).

126601961 is an equidigital number, since it uses as much as digits as its factorization.

126601961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174870.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 126601961 is about 11251.7536855372. The cubic root of 126601961 is about 502.1268878676.

The spelling of 126601961 in words is "one hundred twenty-six million, six hundred one thousand, nine hundred sixty-one".