142630261 has 16 divisors (see below), whose sum is σ = 149173488. Its totient is φ = 136281600.

The previous prime is 142630253. The next prime is 142630273. The reversal of 142630261 is 162036241.

It can be written as a sum of positive squares in 8 ways, for example, as 5880625 + 136749636 = 2425^2 + 11694^2 .

It is a cyclic number.

It is not a de Polignac number, because 142630261 - 2³ = 142630253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142630211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 507441 + ... + 507721.

It is an arithmetic number, because the mean of its divisors is an integer number (9323343).

Almost surely, 2^142630261 is an apocalyptic number.

It is an amenable number.

142630261 is a deficient number, since it is larger than the sum of its proper divisors (6543227).

142630261 is a wasteful number, since it uses less digits than its factorization.

142630261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 142630261 is about 11942.7911729210. The cubic root of 142630261 is about 522.4810685814.

The spelling of 142630261 in words is "one hundred forty-two million, six hundred thirty thousand, two hundred sixty-one".