425550121 has 4 divisors (see below), whose sum is σ = 425655252. Its totient is φ = 425444992.

The previous prime is 425550119. The next prime is 425550127. The reversal of 425550121 is 121055524.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 155276521 + 270273600 = 12461^2 + 16440^2 .

It is a cyclic number.

It is not a de Polignac number, because 425550121 - 2¹ = 425550119 is a prime.

It is a super-2 number, since 2×425550121² = 362185810966229282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (425550127) 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, 46240 + ... + 54673.

It is an arithmetic number, because the mean of its divisors is an integer number (106413813).

Almost surely, 2^425550121 is an apocalyptic number.

It is an amenable number.

425550121 is a deficient number, since it is larger than the sum of its proper divisors (105131).

425550121 is a wasteful number, since it uses less digits than its factorization.

425550121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105130.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 425550121 is about 20628.8662073319. The cubic root of 425550121 is about 752.1715558733.

The spelling of 425550121 in words is "four hundred twenty-five million, five hundred fifty thousand, one hundred twenty-one".